Dealer made to return revolutionary painting? (6)
I believe the answer is:
trader
'dealer' is the definition.
(I know that dealer can be written as trader)
'to return revolutionary painting?' is the wordplay.
'to return' shows that the letters should be reversed in order.
'revolutionary' becomes 'red' (red can informally mean communist).
'painting?' becomes 'art' (painting is an art).
'red'+'art'='redart'
'redart' backwards is 'TRADER'.
'made' acts as a link.
(Other definitions for trader that I've seen before include "One in business" , "He buys and sells goods" , "Tarred the dealer badly" , "Merchant ship; dealer" , "Tarred like merchant" .)