Refinement shown by French resort type? Not half! (6)
I believe the answer is:
nicety
'refinement' is the definition.
('nicety' can be a synonym of 'refinement')
'shown by french resort type? not half' is the wordplay.
'shown by' is a charade indicator (letters next to each other).
'french resort' becomes 'nice' (I've seen this before).
'not half' means to take half the letters.
'type' with half the letters taken is 'ty'.
'nice' put next to 'ty' is 'NICETY'.
(Other definitions for nicety that I've seen before include "Subtle point of distinction" , "Matter of delicate adjustment" , "Refinement" , "Minute distinction; subtlety" , "Subtle difference" .)