Free to use exact rite (9)
I believe the answer is:
extricate
'free' is the definition.
(extricating is a kind of freeing)
'use exact rite' is the wordplay.
'use' indicates anagramming the letters.
'exact'+'rite'='exactrite'
'exactrite' is an anagram of 'EXTRICATE'.
'to' acts as a link.
(Other definitions for extricate that I've seen before include "Free from entanglement" , "Free from complicated situation" , "Disentangle, set free" , "Free (someone) from difficulty" , "wriggle free" .)