Answer: standup

AnswerCrossword Clue
STANDUP

Prove valid, durable, etc.

STANDUP

Routine activity?

STANDUP

Funny business?

STANDUP
Courageously loyal
STANDUP
.... comic
STANDUPOpen mike night format, perhaps
STANDUPSome club entertainment
STANDUPType of comedian
STANDUPKind of comic
STANDUPWear well
STANDUPArise
STANDUPKind of comedian
STANDUPRemain durable
STANDUPRemain sound under stress.
STANDUPFail to keep a date with: Slang.
STANDUPLast.
STANDUPComedy genre
STANDUPEndure.
STANDUPRise.
STANDUPProve valid.
STANDUPLike some triples
STANDUPRise
STANDUPGet off a chair
STANDUPGet out of one's chair
STANDUPHonest
STANDUPLose one's lap
STANDUPKind of comedy
STANDUPComedy Central genre
STANDUPRoutine job?
STANDUPComedy club act
STANDUPSeinfeld's forte