Answer: arspoetica

AnswerCrossword Clue
ARSPOETICAMacLeish work inspired by a treatise published circa 18 B.C.
ARSPOETICAArchibald MacLeish work
ARSPOETICAHorace work (6)
ARSPOETICAWork by Horace.
ARSPOETICATreatise by Horace
ARSPOETICAClassical treatise on verse