Loaf with a nutty flavour? (3)

I believe the answer is:

cob

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

I don't understand how the remainder of the clue works.

(Other definitions for cob that I've seen before include "Horse, male swan and loaf of bread" , "Source of bread" , "Swan of Jacobean origin" , "Hazelnut" , "Round loaf of bread" .)

I've seen this clue in the Evening Standard.

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