Music-work (4)
I believe the answer is:
opus
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">music</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that opus is a type of music)</span><br/ ><br/ >'<span class="explanation-format__original">work</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(an opus is an artistic work)</span><br/ ><br/ ></span>
(Other definitions for opus that I've seen before include "(Numbered) musical composition" , "Soup (anag.)" , "Artistic work" , "Work (of a composer?)" , "Piece of music (with number)" .)