Possibly catch dissolute Frenchman revolting (8)
I believe the answer is:
fastener
'possibly catch' is the definition.
(fastener is a type of catch)
'dissolute frenchman revolting' is the wordplay.
'dissolute' becomes 'fast' (I've seen this before).
'frenchman' becomes 'rene' (common French name).
'revolting' shows that the letters should be reversed in order.
'rene' backwards is 'ener'.
'fast'+'ener'='FASTENER'
(Other definitions for fastener that I've seen before include "Pin, popper or zip, perhaps" , "Stud perhaps" , "Eg, clip or catch" , "Clip, catch, etc" , "Clip, catch or zip" .)