Roman poet and satirist whose works include the Ars Poetica (6)
I believe the answer is:
horace
(Other definitions for horace that I've seen before include "Roman lyric poet, d.8BC -- a chore (anag)" , "Odist" , "- Walpole, eighteenth century English author" , "Roman poet and satirist" , "Is it a chore to read this old Roman poet?" .)