Authentic revolutionary zeal's capable of surviving imprisoning (10)
I believe the answer is:
verifiable
'authentic revolutionary' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?
'zeal's capable of surviving imprisoning' is the wordplay.
I cannot really see how this works, but
'capable' could be 'able' (synonyms) and 'able' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for verifiable that I've seen is " Able to be confirmed".)