City spread (12)
I believe the answer is:
philadelphia
This clue could be a double definition.
'city' is the first definition.
(I know that Philadelphia is a city)
'spread' is the second definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
Can you help me to learn more?
(Other definitions for philadelphia that I've seen before include "US federal capital, 1790-1800" , "US city on the Delaware river" , "City of Brotherly Love" , "City where the American Declaration of Independence was signed" , "US Quaker city, former capital" .)