Boisterous comedy (9)
I believe the answer is:
slapstick
'boisterous comedy' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for slapstick that I've seen before include "laugh" , "Unsubtle comedy" , "Simple comic act" , "Knockabout comedy based on action rather than words" , "Knockabout farce" .)