One of the Muses (5)
I believe the answer is:
erato
'one of the muses' 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 "Greek muse of lyric and love poetry" , "Muse of 11 and 23" , "Poet's inspiration" , "Poet's muse" , "Who may have inspired poetry" .)