Strap attached to a horse's bit (4)

I believe the answer is:

rein

(Other definitions for rein that I've seen before include "Slow-up" , "Horse's steering strap" , "Restraint; strap attached to horse's bit" , "A means of control" , "Leather used for control in horse-riding" .)

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.