Crossword Genius

A cleaner fuel that draws well (8)

Ross

I believe the answer is:

charcoal

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'draws well' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?

'a cleaner fuel' is the wordplay.
'a cleaner' becomes 'char' (charwoman is a type of cleaner).
'fuel' becomes 'coal' (coal is a kind of fuel).
'char'+'coal'='CHARCOAL'

'that' is the link.

Can you help me to learn more?

(Other definitions for charcoal that I've seen before include "Black stuff for burning or drawing" , "Fuel eg for barbecue" , "What gets Barbie going" , "Fuel used for drawing" , "Stick of black carbon material used for drawing" .)

I've seen this clue in The Guardian and The Globe and Mail.
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