Rikishi compete in it (4)

I believe the answer is:

sumo

(Other definitions for sumo that I've seen before include "Jap. wrestling" , "Japanese form of wrestling" , "Style of traditional Japanese wrestling" , "Kind of wrestling" , "foreign form of fighting" .)

I've seen this clue in The New York 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.