Dwarf of German folklore who destroys himself after his name is correctly guessed (15)

I believe the answer is:

rumpelstiltskin

(Other definitions for rumpelstiltskin that I've seen before include "Legendary spinner" , "Impish type" , "Mischief-maker" , "wee chap" , "[FAIRY STORY REF]" .)

I've seen this clue in The Times and The Sunday Times.

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