A French Connection release? (5)
I believe the answer is:
untie
'release?' is the definition.
(thesaurus)
'a french connection' is the wordplay.
'a french' becomes 'un' ('a' in French).
'connection' becomes 'tie' (tie is a kind of connection).
'un'+'tie'='UNTIE'
(Other definitions for untie that I've seen before include "Open a knot" , "Release from bonds or open shoelace" , "get rid of bonds" , "Free from restraining bonds or ropes" , "Disconnect; release" .)