City Democrat also called Republican (5)
I believe the answer is:
dakar
'city' is the definition.
(Dakar is an example)
'democrat also called republican' is the wordplay.
'democrat' becomes 'd'.
'also called' becomes 'aka' (also known as).
'republican' becomes 'R' (abbreviation in US politics).
'd'+'aka'+'r'='DAKAR'
(Other definitions for dakar that I've seen before include "Capital of Senegal" , "place in Africa" , "Senegal's capital" .)