Popular little ridge (7)

I believe the answer is:

lowbrow

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'popular little ridge' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

This is the entire clue.

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(Other definitions for lowbrow that I've seen before include "Unsophisticated" , "Anti-intellectual" , "Downmarket" , "Mass-market" , "Undemanding (entertainment)" .)

I've seen this clue in The Telegraph.

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