- TEC
- P.I.
- Dick
- Gumshoe
- Gumshoe, casually
- Dick, in old slang
- Case guy
- Case guy, for short
- He works on a case by case basis
- He's a dick
- Queen, e.g., for short
- Shamus
- ___-9 (semi-automatic weapon)
- Case worker
- Sleuth
- Private eye
- Sam Spade, for one
- Old-time gumshoe
- Sleuth, briefly
- Philip Marlowe type, informally
- One who might document assignations, informally
- Private eye, slangily
- Sherlock
- Gumshoe, for short
- Hammer or Spade, e.g.
- Gumshoe, briefly
- Investigator, slangily
- Private eye, for short
- Sleuth, to Sayers
- Criminal investigator, for short
- Investigator, briefly
- Investigator, informally
- Whodunit solver, briefly
- Hawkshaw
- P.I.^TE
- Magnum, for one
- Hammer, e.g., briefly
- Hi-__: shoe brand
- Magnum, e.g., briefly
- Spade, e.g., briefly
- Spade, e.g., slangily
- Dick Tracy is one, briefly
- V.I. Warshawski, e.g.
- Private eye, briefly
- Hammett's Spade, e.g.
- Noir hero
- Noir protagonist
- Sam Spade type
- Sleuth, slangily
- Sam Spade, e.g.
- Adulterer follower, in slang
- TV's Jim Rockford, for one
- Noir sleuth
- Many a noir hero
- Columbo, for one
- Eye
- Sleuth in pulp fiction
- Sleuth, for short
- Either half of 42 Across
- Frequent film noir protagonist
- Snooping pro
- Pulp protagonist, perhaps
- Common pulp protagonist
- Caper film narrator, often
- Caper investigator
- Chandler/Hammett hero
- Hero of hard-boiled fiction
- Old-time investigator
- Film noir investigator
- Pulp fiction gumshoe
- Private dick
- Sleuth, in slang
- Detective: Slang.
- Thief's enemy: Colloq.
- Army subrating: Abbr.
- Sleuth: Slang.
- Sleuth: Sl.
- Plain-clothes man: Slang.
- Clue man.
- Operative: Slang.
- Plainclothesman, for short
- Soho sleuth
- Flatfoot's relative
- Operative, for short
- See 50 Down
- L.A.P.D. member
- Spade or Hammer
- Lt. Columbo, e.g.
- Mike Hammer, for one
- Sleuth, informally
- Pinkerton, e.g.
- P.I., e.g.
- Clue collector, slangily
- Case studier, slangily
- Clue hunter, informally
- Person with a magnifying glass, for short?
- Spade, e.g., for short
- Sue Grafton's Kinsey Millhone, e.g.
- Private investigator, in slang
- 20-Across, e.g., informally
- Classic Bogart role, in slang
- Sleuth, in old crime fiction
- Private eye, in old slang
- Investigator, in old film noir
- Solver with a set of clues, for short
- Sam Spade, e.g., informally
- Private eye, in old lingo
- Private eye, quaintly
- Hercule Poirot, e.g., for short
- Dick Tracy, e.g.
- Slangy sleuth
- Private eye, informally
- Benoit Blanc of "Knives Out," e.g., briefly
- Sleuth, in old slang
- Hammer or Spade
- P.I., in old slang
- Private eye, in old-timey slang
- G-man
- Clue analyzer, in slang
- Sleuth, in potboilers
- Sleuth's cohort
- Clue seeker, briefly
- P.I. kin
- PI or sleuth
- Private eye, etc.
- Sleuth kin
- Investigator for short
- Operator: Abbr.
- Pulp fiction sleuth
- Short investigator
- Gumshoe, slangily
- Gumshoe or shamus
- Columbo, famously (Abbr.)
