Muse of love poetry (5)
I believe the answer is:
erato
'muse of love poetry' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for erato that I've seen before include "Greek muse - orate (anag)" , "Clio's sister" , "inspiration for poetry" , "One of nine" , "verses she inspired" .)