Boy pharaoh, for short (3)

I believe the answer is:

tut

(Other definitions for tut that I've seen before include "Exclamation of rebuke, usually doubled" , "I disapprove" , "Exclamation of disapproval or annoyance" , "Reaction" , "Noise of disapproval" .)

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

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