Answer: FLAP

AnswerCrossword Clue
FLAPFlutter in the wind
FLAPHoo-ha
FLAPTent door
FLAPEnvelope part
FLAPTry to stay up?
FLAPMove, as one's wings
FLAPWing it?
FLAPEnvelope part that's licked
FLAPPop-up book feature
FLAPWhat a cat might enter
FLAPCommotion
FLAPOpening in some pajamas
FLAPBeat, as wings
FLAPRuckus
FLAPBook jacket part
FLAPDoor in the woods
FLAPDoctor Dentons feature
FLAPAileron
FLAPEnvelope closer
FLAPEnvelope feature
flapsomething flat attached at one side and hanging loosely
FLAPAdo
FLAPBook-jacket part
FLAPArgument
FLAPAirplane wing part
FLAPUproar
FLAPKerfuffle
FLAPTizzy
FLAPBrouhaha
FLAPDr. Dentons feature
FLAPTrouble
FLAPTo-do
FLAPBook jacket foldover
FLAPEntrance at a bivouac, perhaps
FLAPHullabaloo
FLAPExercise, as wings
FLAPWing movement
FLAPWhat flags do in the wind
FLAPTent part
FLAPAgitated state