Certain horses (5)

I believe the answer is:

arabs

'certain horses' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for arabs that I've seen before include "Graceful horses" , "Semites" , "eg Saudis" , "Semitic people in the Middle East and northern Africa" , "They live mainly in the Middle East and North Africa" .)

I've seen this clue in The New York Times.

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