Crossword Genius

A burning issue? (3)

Ross

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3

4

ash

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'a burning issue?' is the definition.
(I've seen this in another clue)

'a burning issue?' is the wordplay.
'burning issue?' becomes 'sh' (I can't explain this - if you can you should believe this answer much more).
'a'+'sh'='ASH'

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(Other definitions for ash that I've seen before include "Runic letter; tree" , "Burnt material; tree" , "What's often left after something 1 Ac" , "Powdery residue from fire or cigarette" , "Common tree" .)

I've seen this clue in the Evening Standard.
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