Answer:

flap

Answer	Crossword Clue
FLAP	Kerfuffle
FLAP	Tent feature
FLAP	Big to-do

FLAP	Feature on the back of some pajamas
FLAP	Envelope part
FLAP	Commotion
FLAP	Brouhaha
FLAP	To-do
FLAP	Pajamas' rear opening
FLAP	What bird wings do
FLAP	Scandal

FLAP	Uproar
FLAP	Noisy to-do
FLAP	Hoo-ha
FLAP	What flags do in the wind
FLAP	Letter opener?
FLAP	Ruckus
FLAP	Book jacket part
FLAP	Part of an envelope

FLAP	Paper airplane part
FLAP	Tizzy
FLAP	Hullabaloo