Lines from Horace (3)
I believe the answer is:
ode
'lines from horace' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ode that I've seen before include "Poem in praise of doe" , "(Railway)system" , "A poem celebrating person or event" , "Lyric poem" , "- - to a 12 Urn" .)