City that may similarly be built up? (5)
I believe the answer is:
civic
'city' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
(Other definitions for civic that I've seen before include "Relating to a town/city" , "This centre of town" , "view of the city" , "concerned with town administration" , "Relating to a citizen" .)