The term 'Hoof Sound Horse' can be summarized by the crossword solution 'CLOP'. This is the sound made by a horse's hooves when it is walking or trotting. It is a rhythmic sound, usually described as a 'CLOP-clop' sound. The sound is created by the horse's hooves striking the ground in a regular pattern. The sound is often associated with horses and is used in many films and television shows to create an atmosphere of rural life.