Comic's stock in trade (4)
I believe the answer is:
gags
'comic's stock in trade' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for gags that I've seen before include "Muffles with slangy jokes" , "Jokes - silences" , "Prevents from speaking the jokes" , "Muzzles or jokes." , "One-liners" .)