Filbert or cob (8)

I believe the answer is:

hazelnut

I believe this is a double definition.

'filbert' is the first definition.
(synonyms)

'cob' is the second definition.
(I know that cob can be written as hazelnut)

(Other definitions for hazelnut that I've seen before include "Cobnut or filbert" , "Filbert or cob" .)

I've seen this clue in The Sun.

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