Vehicle is hot – it does this in a puff of smoke? (6)

I believe the answer is:

vanish

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'it does this in a puff of smoke?' is the definition.
The answer and definition are not the same part of speech.

'vehicle is hot' is the wordplay.
'vehicle' becomes 'van' (type of vehicle).
'hot' becomes 'h' (abbreviation, eg on taps).
'van'+'is'+'h'='VANISH'

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(Other definitions for vanish that I've seen before include "Disappear completely" , "Disappear (in a puff of smoke?)" , "Disappear suddenly" , "Go missing" , "Become invisible" .)

I've seen this clue in The Guardian.

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