Possible Clues:

• Moves of a trained horse
• Way to train horses, say, when covered in hair
• Staff, say, joining English riding school
• Place where you'll find horses, say, covered in hair
• Horsemanship; arena
• Meet tailless nag trained here?
• Where chap, say, gets introduction to equitation
• Actions of a trained horse
• Skin disease going around English riding school
• School for training horses