Crossword Genius

Product of combustion (5)

Ross

I believe the answer is:

smoke

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">product of combustion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for smoke that I've seen before include "Visible vapour" , "'There's no . . . . . without fire'" , "cause of a cough?" , "Use tobacco" , "Cure (eg, herring)" .)

I've seen this clue in The Mirror.
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