Delicacy in French resort toyboy vacated (6)
I believe the answer is:
nicety
'delicacy' is the definition.
(thesaurus)
'french resort toyboy vacated' is the wordplay.
'french resort' becomes 'nice' (I've seen this before).
'vacated' says to hollow out the word (remove centre letters).
'toyboy' with its middle removed is 'ty'.
'nice'+'ty'='NICETY'
'in' is the link.
(Other definitions for nicety that I've seen before include "Finesse" , "Matter of delicate adjustment" , "Subtle point of distinction" , "Degree of precision" , "shade?" .)