Revolutionary trading extremes for religion (6)
I believe the answer is:
taoism
'for religion' is the definition.
(Taoism is an example)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for taoism that I've seen before include "Religious movement" , "Maoist (anag) -- Chinese religion" , "Chinese thinking" , "Chinese philosophical system" , "Ancient Chinese philosophy" .)