Port of Yemen (4)
I believe the answer is:
aden
'port of yemen' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aden that I've seen before include "Main port of Yemen" , "Dean is out in the Middle Eastern port" , "Dane in seaport of Yemen" , "Yemeni port" , "Former Br. Gulf colony" .)