Region where bluegrass originated (10)

I believe the answer is:

appalachia

(Other definitions for appalachia that I've seen before include "Mountainous region of eastern USA" , "US mountain region" , "American region" , "Area of eastern US" , "US mining area" .)

I've seen this clue in the USA Today.

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.