Crossword Genius

Burn most of map (4)

Ross

I believe the answer is:

char

'burn' is the definition.
(charring is a kind of burning)

'most of map' is the wordplay.
'most of' means to remove the last letter.
'map' becomes 'chart' (chart is a kind of map).
'chart' with its last letter removed is 'CHAR'.

(Other definitions for char that I've seen before include "Make black by burning, say toast" , "Blacken by burning" , "Partially burn; fish" , "Scorch - fish - cleaning lady" , "toast far too much?" .)

I've seen this clue in The Independent.
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