Abu Dhabi denizen (4)
I believe the answer is:
arab
'abu dhabi denizen' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for arab that I've seen before include "One from the Middle East, say" , "Mount" , "Qatari or Omani, say" , "Fine horse breed" , "One from the Middle East or North Africa" .)