Crossword Genius

Piece of headgear worn by a horse (6)

Ross

I believe the answer is:

bridle

(Other definitions for bridle that I've seen before include "Bit and reins, etc" , "Headgear used to control a horse" , "Take offence" , "Part of horse's headgear" , "Rein" .)

I've seen this clue in the Universal.
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.