Cordon broken by a winger (6)
I believe the answer is:
condor
'a winger' is the definition.
(condor is a kind of bird)
'cordon broken' is the wordplay.
'broken' indicates an anagram.
'cordon' with letters rearranged gives 'CONDOR'.
'by' is the link.
(Other definitions for condor that I've seen before include "Andean vulture" , "Large bird of the Andes (national symbol of Peru)" , "South American vulture" , "Great bird of the Andes" , "Largest New World vulture" .)