US-Canadian falls (7)

I believe the answer is:

niagara

'us-canadian falls' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for niagara that I've seen before include "North American waterfall" , "Famous waterfalls" , "N. American waterfall" , "Great waterfalls on border of USA and Canada" , "A lot of falling water" .)

I've seen this clue in The Times.

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