Work with affected type who may not cooperate? (7)
I believe the answer is:
opposer
'who may not cooperate?' is the definition.
(someone who opposes things)
'work with affected type' is the wordplay.
'work' becomes 'op' (abbreviation for opus).
'with' means one lot of letters go next to another.
'affected type' becomes 'poser' (a poser is affected or pretentious).
'op'+'poser'='OPPOSER'
(Other definitions for opposer that I've seen before include "Second to speak" , "Person against the motion" , "Adversary" , "Contender" , "One against something" .)