One who deals in revolutionary communist paintings (6)
I believe the answer is:
trader
'one who deals' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'revolutionary communist paintings' is the wordplay.
'revolutionary' says the letters should be written in reverse.
'communist' becomes 'red' (red is a kind of communist).
'paintings' becomes 'art' (I've seen this before).
'red'+'art'='redart'
'redart' written backwards gives 'TRADER'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for trader that I've seen before include "Retard (anag.)" , "He buys and sells goods" , "Tarred the dealer badly" , "One in business" , "Dealer who buys and sells" .)