Business processing pilchards and hens (5,8)

I believe the answer is:

ship's chandler

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'business' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'processing pilchards and hens' is the wordplay.
'processing' indicates anagramming the letters.
'and' is a charade indicator (letters next to each other).
'pilchards'+'hens'='pilchardshens'
'pilchardshens' anagrammed gives 'SHIPS CHANDLER'.

Can you help me to learn more?

(Another definition for ship's chandler that I've seen is " Nautical merchant".)

I've seen this clue in The Times.

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