Spills the beans, say, on vegetables (5)

I believe the answer is:

leeks

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'vegetables' is the definition.
(leek is a kind of vegetable)

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

(Other definitions for leeks that I've seen before include "Welsh vegetables?" , "Scallions" , "Vichyssoise ingredient" , "Emblems of 19" , "Vegetables - keels (anag)" .)

I've seen this clue in the Sydney Morning Herald.

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