Search after payment method for seafood (7)

I believe the answer is:

codfish

'for seafood' is the definition.
(codfish is a kind of seafood)

'search after payment method' is the wordplay.
'search' becomes 'fish' (fishing is a kind of searching).
'after' means one lot of letters go next to another.
'payment method' becomes 'COD' (cash on delivery).
'fish' put after 'cod' is 'CODFISH'.

I've seen this clue in The Daily Express.

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