Fine points supplied by French city with connections (8)
I believe the answer is:
niceties
'fine points' is the definition.
(I've seen this before)
'french city with connections' is the wordplay.
'french city' becomes 'nice'.
'with' is a charade indicator (letters next to each other).
'connections' becomes 'ties' (tie is a kind of connection).
'nice'+'ties'='NICETIES'
'supplied by' acts as a link.
(Other definitions for niceties that I've seen before include "Delicacy" , "refinement" , "delicacies" , "Fine points" , "Shades" .)