Territory a couple of enemies cross (7)
I believe the answer is:
emirate
'territory' is the definition.
(I have seen 'Islamic territory' mean 'emirate' so perhaps 'territory' could also mean 'emirate')
'a couple of enemies cross' is the wordplay.
'a couple of enemies' becomes 'em' (I am not sure about this - if you are sure you should believe this answer much more).
'cross' becomes 'irate' (both can mean angry).
'em'+'irate'='EMIRATE'
Can you help me to learn more?
(Other definitions for emirate that I've seen before include "chieftain's office" , "One of the Gulf states" , "Arab state" , "Middle Eastern state" , "Gulf state, perhaps" .)