Its capital is Baghdad (4)
I believe the answer is:
'its capital is baghdad' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for iraq that I've seen before include "Mosul's country" , "Present-day site of Mesopotamia" , "Middle-Eastern state" , "In ancient times, it was known as Mesopotamia" , "Middle East republic, capital Baghdad" .)