Finished with French resort - too fastidious (8)
I believe the answer is:
overnice
'too fastidious' is the definition.
(I've seen this before)
'finished with french resort' is the wordplay.
'finished' becomes 'over' (over can mean finished or ended).
'with' says to put letters next to each other.
'french resort' becomes 'nice' (French coastal resort).
'over'+'nice'='OVERNICE'
(Other definitions for overnice that I've seen before include "Too fastidious" , "too chocolate-boxy" , "Excessively fussy" , "Too difficult" .)