Free run past turning (7)
I believe the answer is:
unstrap
'free' is the definition.
(thesaurus)
'run past turning' is the wordplay.
'turning' indicates an anagram.
'run'+'past'='runpast'
'runpast' anagrammed gives 'UNSTRAP'.
(Other definitions for unstrap that I've seen before include "loose" , "Remove fastenings from" , "Loosen tie" , "Release" .)