Lure of French affectedly shy (5)
I believe the answer is:
decoy
'lure' is the definition.
(synonyms)
'of french affectedly shy' is the wordplay.
'of french' becomes 'de' ('of' in French).
'affectedly shy' becomes 'coy' (I've seen this in another clue).
'de'+'coy'='DECOY'
(Other definitions for decoy that I've seen before include "Thing used to lure animal into trap" , "Imitation creature used to attract others" , "It's used to lead into a trap" , "Lure or snare" , "Inveigle" .)