Answer: ACTUP

AnswerCrossword Clue
ACTUPRaise hell
ACTUPMisbehave: Colloq.
ACTUPBehave playfully: Colloq.
ACTUPMake mischief.
ACTUPCarry on.
ACTUPShow off.
ACTUPCut a caper.
ACTUPBehave obstreperously.
ACTUPWhat brats do
ACTUPCreate a fuss
ACTUPMake trouble
ACTUPBecome troublesome
ACTUPRecur, as arthritis
ACTUPMake mischief
ACTUPStart to malfunction
ACTUPScream or be rowdy, as a child
ACTUPBe refractory.
ACTUPMake a nuisance of oneself
ACTUPNot perform as expected
ACTUPStart sputtering, say
ACTUPGo haywire
ACTUPBe rowdy
ACTUPBe mischievous
ACTUPEmulate a brat
ACTUPDeserve a punishment
ACTUPBehave like a brat
ACTUPGet rowdy, e.g.
ACTUPRecur, in a way
ACTUPAnnoy the sitter
ACTUPL.G.B.T.-aligned advocacy group since 1987
ACTUPThrow a hissy fit
ACTUPBehave badly
ACTUPMisbehave
ACTUPGo on the fritz
ACTUPDo as toddlers do
ACTUPBe bothersome
ACTUPBe naughty
ACTUPGet out of line
ACTUPMake a scene
ACTUPBe bratty