Crossword Genius

A country of flat dwellers (7)

Ross

I believe the answer is:

holland

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'a country' is the definition.
(Holland is an example)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for holland that I've seen before include "European country" , "European kingdom" , "Don Hall is in the Netherlands" .)

I've seen this clue in The Globe and Mail.
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