Secured criminal is liberated (7)
I believe the answer is:
rescued
'is liberated' is the definition.
(I've seen this in another clue)
'secured criminal' is the wordplay.
'criminal' is an anagram indicator.
'secured' anagrammed gives 'RESCUED'.
(Other definitions for rescued that I've seen before include "Saved from - seducer (anag)" , "set free" , "Extricated" , "Saved (from danger)" , "Delivered from danger" .)