Sweating perhaps, potting a red (6)
I believe the answer is:
maoist
'red' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for maoist that I've seen before include "supporter of old Communist" , "Supporter of a previous Chinese leader" , "Chinese-style left-winger" , "Follower of the Chinese Chairman's Little Red Book -- Taoism (anag)" , "Political ideologist" .)