Fine points of relations with French city? (8)
I believe the answer is:
niceties
'fine points' is the definition.
(I've seen this before)
'relations with french city?' is the wordplay.
'relations' becomes 'ties' (tie can mean a link or relation).
'with' means one lot of letters go next to another.
'french city?' becomes 'Nice' (Nice is a French city).
'ties' after 'nice' is 'NICETIES'.
'of' is the link.
(Other definitions for niceties that I've seen before include "delicacies" , "Shades" , "refinement" , "Delicacy" , "Fine points" .)