Answer: polopony

AnswerCrossword Clue
POLOPONYMount for Pete Bostwick.
POLOPONYSporting animal.
POLOPONYEquine in a chukker
POLOPONYSportsman's mount
POLOPONYAgile equine
POLOPONYSport mount
POLOPONYOne involved in horseplay?