Answer: GOAHEAD

AnswerCrossword Clue
GOAHEAD"Be my guest"
GOAHEAD"I'm not stopping you"
GOAHEAD"Knock yourself out"
GOAHEADPermission
GOAHEADApproval
GOAHEADLike a tiebreaking run
GOAHEADStarter's signal.
GOAHEADProceed.
GOAHEADAdvance.
GOAHEADGreen light.
GOAHEADKind of signal
GOAHEADGreen light
GOAHEAD"After you"
GOAHEAD"Proceed"
GOAHEAD"Give it a try"
GOAHEADOkay