Crossword Genius

Having blackened, cleaned (7)

Ross

I believe the answer is:

charred

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

I don't understand the rest of the clue.

Can you help me to learn more?

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

I've seen this clue in Evening Standard.
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