A setback for one who reveres revolution? (7)

I believe the answer is:
reverse
'a setback for one who' is the definition.
'reverse' can be an answer for 'a setback' (synonyms). I am unsure of the remainder of the definition.
'reveres revolution?' is the wordplay.
'revolution?' is an anagram indicator (I've seen 'revolution' mean this).
'reveres' is an anagram of 'REVERSE'.
Can you help me to learn more?
(Other definitions for reverse that I've seen before include "Back (of a coin or medal)" , "Turn back to front" , "Go in the opposite direction" , "Setback; go back" , "One side of a coin" .)
