Crossword Genius

Having blackened, cleaned (7)

Ross

I believe the answer is:

charred

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'cleaned' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

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(Other definitions for charred that I've seen before include "Cleaned" , "Partially burnt" , "Scorched and blackened" , "Slightly burnt" , "what's black on surface" .)

I've seen this clue in the Evening Standard.
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