Poet's Muse (5)
I believe the answer is:
erato
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">poet's muse</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for erato that I've seen before include "One of the Muses" , "One inspiring" , "poetical inspiration" , "One of nine" , "Source of poetic inspiration" .)