A Derby Entrant is a participant in a derby race, which is a type of HORSE race. The crossword solutions for this term are COLT (4 letters), RACER (5 letters), RACEHORSE (9 letters), HORSE (5 letters), RAMMER (6 letters), FOAL (4 letters), and SKATER (6 letters). A COLT is a young male HORSE, usually under the age of four. A RACER is a HORSE that is bred and trained to compete in races. A RACEHORSE is a HORSE that is used for racing. A HORSE is a hoofed mammal that is used for riding and for pulling loads. A rammer is a HORSE that is used for plowing and other agricultural work. A FOAL is a young HORSE, usually under the age of one. A skater is a HORSE that is used for ice skating.