Rivers in the country (5)

I believe the answer is:

rural

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'in the country' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for rural that I've seen before include "covering the country" , "Arcadian" , "Sort of dean" , "Bucolic; pastoral" , "outside the city?" .)

I've seen this clue in The Sunday Times.

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