Agreeable French city (4)
I believe the answer is:
nice
I believe this is a double definition.
'agreeable' is the first definition.
(I've seen this in another clue)
'french city' is the second definition.
(Nice is a French city)
(Other definitions for nice that I've seen before include "French city - sounds plesant" , "French resort; subtle" , "Portuguese river, a centre for port" , "French city - sounds pleasant" , "Pleasant, agreeable" .)