The term 'track horse' can be broken down into two crossword solutions: 'PACER' (5 letters) and 'STEED' (5 letters). A PACER is a type of horse that is used in harness racing, where the horse pulls a two-wheeled cart called a sulky. Pacers are usually bred for speed and agility, and they are trained to maintain a consistent pace. A STEED is a general term for a horse, typically one that is strong and fast. It is often used to describe a horse that is ridden by a knight or other heroic figure.