Yemeni gulf city (4)
I believe the answer is:
aden
'yemeni gulf city' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aden that I've seen before include "Main port of Yemen" , "Yemen's chief port" , "foreign climes" , "Dean out in the seaport city" , "Commercial capital of Yemen" .)