Answer: excuseme

AnswerCrossword Clue
EXCUSEME"What?"
EXCUSEMESteve Martin catch phrase
EXCUSEME"I beg your pardon"
EXCUSEMEOops, sorry
EXCUSEMESteve Martin's "Well, ...!"
EXCUSEME"What say?"
EXCUSEMEResponse to an insult
EXCUSEMEInterrupter's words