Crossword Genius

Brain left fool (4)

Ross

I believe the answer is:

loaf

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

'left fool' is the wordplay.
'left' becomes 'l' (common abbreviation).
'fool' becomes 'oaf' (I've seen this before).
'l'+'oaf'='LOAF'

(Other definitions for loaf that I've seen before include "BRINK/BRICK" , "Lounge about" , "bloomer, say" , "Pass time idly" , "Bread - brain!" .)

I've seen this clue in The Telegraph.
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