Ancient Greek or Egyptian city (6)
I believe the answer is:
thebes
'ancient greek or egyptian city' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for thebes that I've seen before include "Greek city founded by Cadmus" , "Greek city of Oedipus" , "Ancient city of upper Egypt" , "One of the oldest Greek cities" , "Ancient city, a rival to Athens" .)