French city's name is unusual (6)
I believe the answer is:
amiens
'french city's' is the definition.
(I've seen this before)
'name is unusual' is the wordplay.
'unusual' is an anagram indicator.
'name'+'is'='nameis'
'nameis' with letters rearranged gives 'AMIENS'.
(Other definitions for amiens that I've seen before include "European town" , "French town" , "capital of Picardy" , "French cathedral city on the river Somme" , "City in northern France" .)