The capital of Jordan (5)
I believe the answer is:
amman
'the capital of jordan' is the definition.
('Amman' can be a synonym of 'capital of jordan')
This is all the clue.
(Other definitions for amman that I've seen before include "Jordanian city" , "Jordanian capital" , "City of Jordan" , "Jordan's capital" , "A capital f-fellow in Jordan?" .)