Nomadic Arab (7)

I believe the answer is:
bedouin
'nomadic arab' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bedouin that I've seen before include "Nomadic Arab of the desert" , "travellers" , "Wandering Arab of the Sahara" , "I dub one (anag)" , "Arab nomadic peoples" .)