- PURR
- Kitty's satisfied sound
- Good engine sound
- Contented kitty sound
- Express contentment
- Feedback from a feline
- Persian for contentment?
- Contented sound for a cat (or a kangaroo, it turns out)
- Hum with pleasure
- Well-oiled machine noise
- Abyssinian approval
- Contented murmur
- Motor's hum
- Raccoon's sound
- Sound content
- Engine sound
- Abyssinian "aah"
- Happy engine sound
- Happy hum
- Sound of happiness
- Sound of a well-tuned engine
- Contented cat sound
- Siamese sound
- Run smoothly
- Sound of contentment
- Contented kitty's sound
- Contented sound
- Show contentedness, perhaps
- Siamese sound of contentment
- Sound from a Siamese
- Sound from an Abyssinian
- Sound of a fine-tuned engine
- Feline hum
- Happy cat's sound
- Sound of pleasure
- Siamese for "Aah!"?
- Siamese for "Ni-i-ice!"?
- Feline "I feel fine"
- Persian sound
- Smooth sound
- Make a catty remark?
- That feels good in Siamese?
- Happy Himalayan's rumble
- Sound of a happy engine
- Cat sound found in the answer at 17-Across
- Sound from a sphynx
- Be catty?
- Cat's sound of contentment
- Sound of a finely tuned engine
- Satisfied Siamese's sound
- Catlike comment
- Feline response
- Sound of a happy cat
- Catty sound
- Fine-tuned-engine sound
- Sign of feline felicity
- Smooth idle
- Smooth-running sound
- Copy cats?
- Cat nap sound
- Contented cat's sound
- Relaxed sound
- Run really well
- Run softly
- Sound smooth
- Contented kitten's sound
- Manx murmur
- Music to a cat lover's ears
- Run well
- Siamese sign of contentment
- Sound finely tuned
- Sound from a contented kitty
- Contentment indicator
- Sound of a contented kitty
- Persian murmur
- Content cat sound
- Good sound at the garage
- Sound from a lynx's larynx
- Happy kitty sound
- Contented rumble
- Garage mechanic's goal, maybe
- Run smoothly, as an engine
- Smooth engine sound
- Murmur, as Morris
- Cat's murmur
- Operate smoothly
- Run great
- Catnap noise
- Hum
- Run like a top
- Run well, as an engine
- Feline sound
- Sound of a tuned engine
- Motor sound
- Sound of satisfaction
- Sound of a Maltese or motor
- Sound of a happy feline
- Sound of a Siamese
- Sound of a happy tabby
- Emulate 76 Down
- Manx "Thanks!"
- Rumble in the jungle?
- Run like a dream
- Sound from a cuddled kitty
- Low murmur.
- Murmuring sound.
- Sound of feline contentment.
- Sound of a motor.
- Sound of feline felicity.
- Cat song.
- Feline's contented note.
- Low murmuring sound.
- Manx' sound.
- Symbol of contentment.
- Good motor sound.
- Sound of a quiet engine.
- Sound Dick Whittington heard.
- Satisfied sound.
- Low sound
- Sound of a sleek engine
- Pet's sound
- Cat sound
- Murmur
- Cat or motor sound
- Happy tabby sound
- Manx's murmur
- One sound of contentment
- Well-tuned engine sound
- Contented cat's comment
- ___ myself to sleep . . . : Twain
- Sound from Tabby's "motor"
- Sound heard in a clowder
- Hum of a motor
- Maltese's murmur
- Clowder sound
- Pleased kitten's sound
- Engine noise
- Satisfied serval's sound
- Sound from Socks
- Result of tummy rubbing?
- Rumble of contentment
- Sound of a cat or engine
- Tabby talk
- Persian output
- I'm happy in Siamese?
- Petted pet's sound
- Say coquettishly
- Sound from a Burmese
- Run perfectly
- Sound from a sex kitten?
- What gentle strokes may produce
- Sign of a contented cat
- Car or cat sound
- Pet sound
- Say sexily
- Result of some heavy petting?
- Himalayan production
- What cats and some engines do
- Respond to a belly rub, say
- Reaction to scritches, maybe
- Sign of cat love
- Speak softly with contentment
- Cat's sound of self-relaxation
- Ideal engine sound
- Sound from a contented cat
- Sound of a Jaguar
- Cat's sound
- Expression of contentment
- Sound of contentedness
- Act catty?
- Copy a kitty
- Cat noise
- Kitten noise
- Kitten sound
- Pleased vibration
- Cat noise whose purpose isn't fully understood by scientists
- Sound from a guinea pig
- Sound of a happy 60-Across
- Contented tabby sound
- I am VERY happy you gave me this catnip
- Cat "aah!"
- I'm happy in the Siamese?
- Kittenish comment
- Sound like a well-tuned engine
- Cat or engine sound
- Smooth-running engine sound
- Sound from Catwoman
- Kittenish sound
- Emulate a happy cat
- Emulate a contented cat
- Catty comment
- Feline murmur
- What engines can do
- Hum, as an engine
- Happy Himalayan's sound
- (Thanks for rubbing my belly!)
- Good engine noise
- Happy cat sound
- Contented cat's communication
- Cat's joyful sound
- Tuned engine's sound
- (Keep scratching my chin, human!)
- Sound from a cat that's "making biscuits," perhaps
- Happy rumble
- Run like a charm, as an engine
- Sound of a content cat
- Abyssinian's sound
- Sound from a contented Siamese
- Contented pet's sound
- Pet's contented sound
- Sound of a contented Siamese
- Cat's rumble
- Sound from a cat or an engine
- Sound of feline bliss
- Happy tabby's sound
- [I'm a happy cat]
- Pleased cat's sound
- Sound from a happy cat
- Sound of a cat's joy
- Sound of a happy Persian
- Murmur in a cat cafe
- 54 Across sound
- [I'm a feline and I feel fine]
- [Sure feels great to bask in the sunlight!]
- Seem satisfied
- Sign of contentment
- Sound engine sound
- Himalayan sound
- Indication of contentment
- Sound from a fine-tuned engine
