Great Basin Natives (4)
I believe the answer is:
utes
'great basin natives' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for utes that I've seen before include "little vans" , "American Indians" , "Native Americans living chiefly in Colorado, Utah and New Mexico" , "New Mexicans" , "Trucks" .)