Spreads I left out in chain stores (9)

I believe the answer is:

multiples

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This could be a double definition.

'spreads' is the first definition.
Although both the answer and definition are plural nouns, I don't understand how one could define the other.

'i left out in chain stores' is the second definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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