Answer: BREAKALEG

AnswerCrossword Clue
BREAKALEG"Good luck!"
BREAKALEGIronic "Good luck!"
BREAKALEG"Knock 'em dead!"
BREAKALEGOpening night expression (with a hidden veggie)
BREAKALEGExpression of luck for an actor
BREAKALEGLine delivered before lines are delivered
BREAKALEGExpression of luck