Wonderful city (7)
I believe the answer is:
capital
I believe this is a double definition.
'wonderful' is the first definition.
'city' is the second definition.
(I know that capital is a type of city)
(Other definitions for capital that I've seen before include "Rome or Oslo?" , "Chief; excellent" , "Cardinal; splendid; assets" , "Means" , "Topping" .)