Answer: heckler

AnswerCrossword Clue
HECKLER

Stand-up's headache

HECKLER

Vociferously vocal audience member

HECKLER

Club comic's bane

HECKLER
Comic bane
HECKLER
Target of an ad-lib comeback
HECKLERPest in the audience.
HECKLERPest in the audience
HECKLERAudience troublemaker
HECKLERComedy club razzer
HECKLERComedy club annoyance
HECKLERComic's bane