Waterfall at the border between Ontario and New York (7)

I believe the answer is:

niagara

(Other definitions for niagara that I've seen before include "Famous waterfall" , "Great falls on border of Canada and USA" , "River linking Lakes Ontario and Erie" , "Famous waterfalls" , "North American waterfalls" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.