Many set free (7)
I believe the answer is:
amnesty
'many set free' is the definition.
'amnesty' can be an answer for 'free' (thesaurus). I'm not sure about the 'many set' bit.
'many set free' is the wordplay.
'free' is an anagram indicator.
'many'+'set'='manyset'
'manyset' anagrammed gives 'AMNESTY'.
Can you help me to learn more?
(Other definitions for amnesty that I've seen before include "Organisation concerned with people unjustly imprisoned" , "A general pardon for offences against the state" , "General pardon for crimes against the state" , "suspension of law" , "Mass pardon of political kind" .)