Equine control (4)

I believe the answer is:

rein

(Other definitions for rein that I've seen before include "Restraint; strap attached to horse's bit" , "Curb" , "Animal controller" , "Part of a horses's harness" , "Hold back" .)

I've seen this clue in the LA 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.