Troubled mind at peace, set free (11)
I believe the answer is:
emancipated
'set free' is the definition.
(I've seen this before)
'troubled mind at peace' is the wordplay.
'troubled' indicates an anagram.
'mind'+'at'+'peace'='mindatpeace'
'mindatpeace' anagrammed gives 'EMANCIPATED'.
(Other definitions for emancipated that I've seen before include "Set free" , "Freed from slavery" , "free from constraints" .)