They live on the Roof of the World, in Lhasa perhaps (8)

I believe the answer is:

tibetans

(Other definitions for tibetans that I've seen before include "Highland people" , "Foreigners" , "They be titans who live in the Himalayas" , "Mountain folk" , "Citizens of Dalai Lama's country" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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