Exclamation of contempt (3-3)

I believe the answer is:

tut-tut

(Other definitions for tut-tut that I've seen before include "Repetitive exclamation of impatience" , "Mild exclamation of disapproval" , "Expression of irritation" , "Word of disapproval" , "For shame!" .)

I've seen this clue in The Guardian.

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