Muse of erotic poetry (5)
I believe the answer is:
erato
'muse of erotic poetry' 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 "goddess" , "Greek muse of lyric and love poetry" , "daughter of Zeus" , "Clio's sister" , "Muse of lyric poetry and mime" .)