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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for ___ sine qua non 5 letters:

HUMOR: . . . and his sine qua non
NEEDS: Sine qua nons
CAUSA: ___ sine qua non
ROTOR: Helicopter's sine qua non
CAUSA: ____ sine qua non (requisite)
VIGOR: Sine qua non for an athlete
INDEX: Sine qua non for a textbook.
CHART: Navigator's sine qua non
LATIN: Sine qua non <P>e.g.
SUPPORT: Congressman's sine qua non.
PETROLEUM: Sine qua non for the wheels of industry.
TABLEWARE: Restaurant sine qua non.
TRAPEZE: Sine qua non for an aerialist.
TEXTBOOK: Student's sine qua non.
FOURHANDS: Sine qua non for certain duets
AGILITY: Sine qua non of pedestrians, subwayites, etc.
MUST: Sine qua non
CHEESE: Welsh-rabbit sine qua non
STEALTH: Thief's sine qua non
BALANCE: Funambulist's sine qua non
BODY: Whodunit sine qua non
CAR: Suburbanite's sine qua non
PADDLE: Sine qua non when up the creek
STEALTH: Cat burglar's sine qua non
PATIENTS: Doctors' sine qua non
STAMINA: Miler's sine qua non
TEAPOT: Sine qua non at an afternoon affair
OVEN: Pizzeria sine qua non
OVEN: Pizzeria's sine qua non
LOANER: Borrower's sine qua non
CAMERA: Sine qua non for 7 Across
AIR: The world's sine qua non
ROOF: Shelter sine qua non
ALERTNESS: Sentry's sine qua non
KEYSTONE: Arch's sine qua non
ADS: TV networks' sine qua non
EAR: Musician's sine qua non
NEED: Sine qua non
EGGS: Soufflé sine qua non
SUCTION: Vacuum-cleaner sine qua non
NERVESOFSTEEL: Hero's sine qua non
IDEA: Creator's sine qua non
RING: Wedding sine qua non
WIT: Art Buchwald's sine qua non
GLAM: Drag queen's sine qua non
ENDALL: Sine qua non
NEEDED: Like a sine qua non
WAVE: Surfing sine qua non
NECESSITY: Sine qua non
AMMO: Battle sine qua non