Cod like this treat prepared in bed? (8)

I believe the answer is:

battered

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'cod like this' is the definition.
The definition suggests a singular noun but the answer is not.

'treat prepared in bed?' is the wordplay.
'prepared' indicates an anagram.
'in' indicates putting letters inside.
'treat' anagrammed gives 'atter'.
'atter' inserted within 'bed' is 'BATTERED'.

Can you help me to learn more?

(Other definitions for battered that I've seen before include "Damaged by repeated blows" , "Bashed" , "Buffeted" , "Struck violently and repeatedly" , "Pummelled, pounded" .)

I've seen this clue in The Sun.

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