Answer:

TIMING

Answer	Crossword Clue
TIMING	Comedian's art
TIMING	Everything, so they say
TIMING	Comedian's forte

TIMING	It's everything, so they say
TIMING	Athlete's concern
TIMING	Comic's concern
TIMING	Comedian's concern
TIMING	Effective spacing of gags.
TIMING	A musical art.
TIMING	Important aspect of an actor's art.
TIMING	Important aspect of pitching, batting, etc.

TIMING	One of Jack Benny's fortes
TIMING	Comic's forte
TIMING	Strategist's consideration
TIMING	Comic's necessity
TIMING	The when of an event
TIMING	Comic's asset
TIMING	It's said to be everything
TIMING	It's everything, it's said

TIMING	Comic actor's asset
TIMING	It's everything