Most Algerians (5)
I believe the answer is:
arabs
'most algerians' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arabs that I've seen before include "They live mainly in the Middle East and North Africa" , "Semitic people of the Middle East and North Africa" , "Graceful horses" , "Semites" , "Semitic people in the Middle East and northern Africa" .)