Answer: flex

AnswerCrossword Clue
FLEXContract one's muscles
FLEXShow off at Muscle Beach
FLEXMove a muscle?
FLEXDisplay some guns
FLEXBend one's elbow, e.g.
FLEXShow off at the gym, say
FLEXFlaunt, say, as muscles
FLEXShow off, like Mr. America
FLEXShow muscle?
FLEXShow off one's "guns"
FLEXTighten a muscle
FLEXBend, as an arm
FLEXShow one's muscles
FLEXBend.
FLEXShampoo brand
FLEXContract
FLEXShow off, as biceps
FLEXCrook
FLEXShow off your guns
FLEXDJ Funkmaster ...
FLEXPop one's pecs
FLEXTighten, as muscles
FLEXShow one's pecs
FLEXEmulate a Mr. Universe contestant
FLEXDisplay muscles
FLEXWork one's muscles
FLEXContract a muscle
FLEXUse a muscle
FLEXRevlon shampoo brand
FLEXSport one's biceps
flexto bend (to curve (to bend))
flexto bend
flexto tighten (a muscle) by contraction
FLEXKind of mortgage
FLEXShow one's biceps, perhaps
FLEXShow off one's bod
FLEXMake like a muscleman
FLEXMove a muscle
FLEXShow of strength?
FLEXLike variable work time