circus equestrian-trick performer
A performer who does tricks on horseback in a circus. This is a specific historical or traditional role, not a general circus performer.
The circus equestrian-trick performer did a handstand on the horse's back.
曲馬 refers to the equestrian tricks or the circus act itself, while 曲馬芸人 is the performer.
サーカス芸人 is a broader term for any circus performer, not limited to equestrian acts.
Compound of 曲馬 (equestrian tricks) + 芸人 (performer). The exact historical derivation is uncertain, but the term is conventionally associated with traditional circus equestrian acts.