Heated camphor used when going bye-byes, possibly? (6)

I believe the answer is:

boiled

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'heated' is the definition.
(thesaurus)

I cannot understand how the remainder of the clue works.

(Other definitions for boiled that I've seen before include "Cooked in hot water" , "Heated to point at which vapour forms" .)

I've seen this clue in The Telegraph.

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