Word with space or rock (5)
I believe the answer is:
opera
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">word with space or rock</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for opera that I've seen before include "Staged event" , "Comic or grand entertainment?" , "Eg, Il trovatore" , "Eg, Don Giovanni" , "Dramatic genre" .)