1) Caper 2) Drama about Trigger 3) Equus 4) Frolic 5) Fun and games 6) Gambol 7) Play 8) Relative of monkeyshines 9) Romp 10) Rough stuff 11) Roughhousing 12) Rowdy or boisterous play 13) Violence in a racing drama Found on https://www.crosswordclues.com/clue/horseplay