Monet's cathedral city (5)
I believe the answer is:
rouen
'monet's cathedral city' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rouen that I've seen before include "French community" , "Port on river Seine" , "Chief river port of France" , "Cathedral city, capital of Normandy" , "City in northern France" .)