Uncooperative individual fires nuke off (9)
I believe the answer is:
refusenik
'uncooperative individual' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'fires nuke off' is the wordplay.
'off' is an anagram indicator.
'fires'+'nuke'='firesnuke'
'firesnuke' anagrammed gives 'REFUSENIK'.
Can you help me to learn more?
(Other definitions for refusenik that I've seen before include "who refuses to cooperate" , "Protester" , "Soviet dissident" .)