Boffin's breakfast food? Loaf (7)

I believe the answer is:

egghead

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

'breakfast food? loaf' is the wordplay.
'breakfast food?' becomes 'egg' (I've seen this before).
'loaf' becomes 'head' (slang term).
'egg'+'head'='EGGHEAD'

(Other definitions for egghead that I've seen before include "Intellectual, studious academic" , "Very academic person" , "Boffin" , "Brainbox" , "Intellectual (colloq.)" .)

I've seen this clue in The Times.

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