Fast-moving river water (6)

I believe the answer is:

rapids

(Other definitions for rapids that I've seen before include "Parts of a river where the current is very fast" , "Where rivers run fast" , "Fast-flowing stretch of river, white water" , "Fast flowing stretch of a river" , "Fast-flowing and turbulent part of a river" .)

I've seen this clue in the Newsday.

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