Crossword Genius

Swim-bike-run race, for short (3)

Ross

I believe the answer is:

tri

(Other definitions for tri that I've seen before include "Denotes three" , "Prefix indicating three" , "Prefix denoting three" , "Prefix meaning three" , "Three-point" .)

I've seen this clue in the Universal, The Wall Street Journal, the USA Today, the LA Times and 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.