Horseplay

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Across
  1. 4. Famous Greek 'horse'
  2. 7. A treat for a good lesson pony
  3. 8. A group of young riders, also a book series
  4. 11. Mr. Ed?
  5. 12. Walk, trot, canter, gallop
  6. 13. Solution for a bouncy trot
  7. 15. Spotty American Breed
Down
  1. 1. Optimistic equestrian?
  2. 2. Fancy horse dancin'
  3. 3. Gentle giants
  4. 5. Barrels, poles, cattle
  5. 6. Famous American horse breed, Spirit
  6. 9. Used in jumps and trot courses
  7. 10. Oxers, crossrails, verticals
  8. 14. "Get off your ___"