Yemeni port (4)
I believe the answer is:
aden
'yemeni port' is the definition.
(port in Yemen)
This is all the clue.
(Other definitions for aden that I've seen before include "Former Br. Gulf colony" , "Yemeni gulf" , "Yemen's chief port" , "Strange Dane to be in the Yemen" , "Port city of Yemen" .)