Reworked Monet or Paris impressionist (12)
I believe the answer is:
impersonator
'impressionist' is the definition.
(I've seen this before)
'reworked monet or paris' is the wordplay.
'reworked' indicates anagramming the letters.
'monet'+'or'+'paris'='monetorparis'
'monetorparis' anagrammed gives 'IMPERSONATOR'.
(Other definitions for impersonator that I've seen before include "One's often acting" , "he takes off" , "Mimic" , "One pretending to be another" , "ape" .)