Something to eat at the seaside, perhaps (4)

I believe the answer is:

kale

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'something to eat' is the definition.
(kale is a kind of food)

I don't understand how the remainder of the clue works.

(Other definitions for kale that I've seen before include "Vegetable" , "Hardy cabbage" , "Crinkle-leaf cabbage" , "Curly-leafed cabbage" , "Something green" .)

I've seen this clue in the Evening Standard.

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