Urban area (4)
(Other definitions for city that I've seen before include "- of God (St Augustine)" , "See 5" , "See 4" , "Urban centre" , "Tokyo, for example" .)
(Other definitions for town that I've seen before include "Densely populated area" , "Community group" , "Carmathen?" , "Borough" , "Small urban development" .)
'urban area' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for township that I've seen before include "farm in Scotland (shared with other tenants)" , "Municipality" , "Urban area for non-whites in South Africa under apartheid" , "Settlement" , "In South Africa during apartheid, an urban area assigned to black nationals" .)