Poetry muse (5)
I believe the answer is:
erato
'poetry muse' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for erato that I've seen before include "poetic patroness" , "Greek muse of lyric and love poetry" , "One of nine" , "Muse of lyric poetry and mime" , "Muse of 11 and 23" .)