Persian Gulf country (7)
I believe the answer is:
bahrain
'persian gulf country' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bahrain that I've seen before include "Gulf state" , "Arab sheikhdom" , "kingdom in Middle East" , "Gulf sheikhdom, capital Manama" , "Island country in the Persian Gulf" .)