Answer:

ACT

AnswerCrossword Clue
ACTBehave
ACTCircus routine
ACTDo something
ACTOpera division
ACTPlay part
ACTPlay the part
ACTStatute
ACTBe in a picture
ACTCharade
ACTClass ..
ACTDrama part
ACTHam it up
ACTTread the boards
ACTVaudeville routine
ACTVaudeville segment
ACTWith 35A, dramatize
ACTDeed
ACTDrama division
ACTPlay unit
ACTPretense
ACTThe Beatles' ".. Naturally"
ACTDo some lines?
ACTExtended lie
ACTLaw
ACTBand at a festival, say
ACTWord with second or class
ACTDo one's part?
ACTMake a move
ACTPlay, in part
ACTBe a thespian
ACTStamp or Riot
ACTMake up one's mind
ACTFalse show
ACTPut-on
ACTUse the Method, maybe
ACTFalse pretense
ACTPerformance
ACTPretend to be
ACTGo into character
ACTCongressional decision