Bending process cracks up on the boards? (7)
I believe the answer is:
corpses
'cracks up on the boards?' is the definition.
(to corpse is to laugh on stage ie on 'the boards')
'bending process' is the wordplay.
'bending' indicates an anagram.
'process' anagrammed gives 'CORPSES'.
(Other definitions for corpses that I've seen before include "Goofs on stage" , "remains" , "Dead bodies" .)