Word: thoroughbred
A horse of a breed derived from crosses between Arabian stallions and English mares, bred for racing. (usually capitalized: Thoroughbred.)
Any purebred horse.
A person of uncommon strength or endurance (like that of a thoroughbred horse). Example: That athlete is a real thoroughbred.
A well-bred person.
Bred from pure stock.
Well-bred and properly educated.
You can find a list of possible crossword clues for THOROUGHBRED below.