Ancient city quarter in South Africa (6)
I believe the answer is:
sparta
'ancient city' is the definition.
(I've seen this before)
'quarter in south africa' is the wordplay.
'quarter' becomes 'part' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'south africa' becomes 'sa' (abbreviation).
'part' placed within 'sa' is 'SPARTA'.
Can you help me to learn more?
(Other definitions for sparta that I've seen before include "austere place" , "Ancient Greek city noted for its austerity" , "Enemy of Athens?" , "Ancient Greek city, capital of Laconia" , "in ancient Greece" .)