Soft-nosed bullet that expands when it hits the target (6)

I believe the answer is:

dumdum

(Other definitions for dumdum that I've seen before include "Illegal soft-nosed bullet" , "idiot" , "Exploding type of bullet" , "Soft-nosed bullet that expands when it hits target" , "missile" .)

I've seen this clue in The Irish Times.

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