Beginners go down these (7,6)

I believe the answer is:

nursery slopes

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'beginners' is the definition.
Both the definition and answer are plural nouns.
Perhaps you can see a link between them that I don't see?

I don't understand the rest of the clue.

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(Other definitions for nursery slopes that I've seen before include "Areas for skiing beginners" , "Where novices learn winter sport" , "Place for ski beginners" , "Area for beginners when skiing" , "Where learners ski" .)

I've seen this clue in The Independent.

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