Independent state in the Persian Gulf whose capital is Al Manamah (7)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
bahrain
(Other definitions for bahrain that I've seen before include "Island country in the Persian Gulf" , "Gulf region?" , "Gulf sheikhdom, capital Manama" , "kingdom in Middle East" , "Arab sheikhdom" .)