Doctrine unaffected by revolution? (5)
I believe the answer is:
tenet
'doctrine' is the definition.
(both can mean a belief or value)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for tenet that I've seen before include "Fundamental belief" , "A belief or creed - a palindrome" , "Article of faith; doctrine" , "Conviction" , "Key principle" .)