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A bighead takes a French one, to eat (3)

Ross

I believe the answer is:

bun

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'one to eat' is the definition.
I can't judge whether this definition defines the answer.

'a bighead takes a french' is the wordplay.
'a bighead' becomes 'b' (head letter of 'big').
'takes' is a charade indicator (letters next to each other).
'a french' becomes 'un' ('a' in French).
'b'+'un'='BUN'

Can you help me to learn more?

(Other definitions for bun that I've seen before include "Small rounded bread or cake" , "Small cake - tied-up hair" , "Small cake or bread roll" , "Something from Bath or Chelsea" , "Tied hair" .)

I've seen this clue in the Evening Standard.
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