Diamond Head locale (4)

I believe the answer is:

oahu

'diamond head locale' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for oahu that I've seen before include "Hawaiian island" , "Pacific island" , "Honolulu's island" , "popular Pacific location" , "Chief island of Hawaii" .)

I've seen this clue in the King Feature Syndicate and the LA Times.

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