Crossword Genius

They're round holes, of course, in vegetables (6)

Ross

I believe the answer is:

greens

I'm a little stuck... Click here to teach me more about this clue!

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

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for greens that I've seen before include "party politicians" , "Leaves" , "Leafy vegetables" , "They're for putting on - vegetables" , "Vegetables and politicians of a certain hue" .)

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