Muscat native (5)
I believe the answer is:
omani
'muscat native' is the definition.
(someone from Muscat in Oman)
This is all the clue.
(Other definitions for omani that I've seen before include "Someone from Muscat" , "Eg, a native of Muscat" , "Gulf Arab" , "one from the Middle East" , "Gulf native" .)