The Old West Icon referred to in the crossword solution is Wyatt Earp, a lawman and gambler who became famous for his role in the Gunfight at the O.K. Corral. Earp was a deputy marshal in Tombstone, Arizona, and was involved in a shootout with members of the Clanton-McLaury gang. He was also known for his involvement in other events in the Old West, such as the Dodge City Peace Commission and the Earp Vendetta Ride.