Mountains in North America (7)

I believe the answer is:

rockies

(Other definitions for rockies that I've seen before include "Mountain range of western North America" , "Great mountain system in western N America" , "US Mountain chain" , "US mountain range" , "Mountain system in west of USA" .)

I've seen this clue in The Irish Times.

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.