Quite set free and at rest (5)
I believe the answer is:
quiet
'at rest' is the definition.
'quite set free' is the wordplay.
'set free' is an anagram indicator.
'quite' is an anagram of 'QUIET'.
'and' is the link.
(Other definitions for quiet that I've seen before include "Tranquil, calm" , "Absence of noise" , "Still" , "Free from activity" , "Noiseless" .)