Leave country without head of great Arab territory (7)
I believe the answer is:
emirate
'arab territory' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for emirate that I've seen before include "One of the Gulf states" , "foreign government" , "Meatier (anag) -- Qatar, for example" , "Middle Eastern state" , "chieftain's office" .)