North African city (5)
I believe the answer is:
tunis
'north african city' is the definition.
(capital of Tunisia)
This is all the clue.
(Other definitions for tunis that I've seen before include "I stun (anag) - port and capital" , "North African port and capital" , "Mediterranean capital and port" , "Capital of a republic in north Africa" , "N African port" .)