Crossword Clue:

a flap of a wing

AnswerCrossword Clue
ELEVONFlap on a plane's wing
NORELIAWing flap
AILERONPlane's wing flap.
AILERONWing control flap.
ELLWing that can't flap
AILERONFlap on an airplane wing
AILERONControl flap on an airplane wing.