Whiskey blows the head off Hurt with most of the heat (6)

I believe the answer is:

warmth

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'heat' is the definition.
(warmth is a kind of heat)

I don't understand the rest of the clue.

(Other definitions for warmth that I've seen before include "Enthusiasm, affection" , "Cordiality" , "Possibly fire" , "Affection, kindness; emotional intensity" , "Result if heated" .)

I've seen this clue in the Irish Times.

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