Winger of uncertain age connected with the French (5)
I believe the answer is:
eagle
'winger' is the definition.
(eagle is a type of bird)
'uncertain age connected with the french' is the wordplay.
'uncertain' indicates an anagram.
'connected with' says to put letters next to each other.
'the french' becomes 'le' ('the' in French).
'age' is an anagram of 'eag'.
'eag'+'le'='EAGLE'
'of' is the link.
(Other definitions for eagle that I've seen before include "Large birds of prey." , "The emblem of the US is bald" , "somewhat under par" , "King of birds" , "born hunter" .)