Musical quality (4)
I believe the answer is:
tone
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">musical quality</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tone that I've seen before include "Musical sound; quality of hue" , "Musical note; general character" , "Shade" , "feel" , "Bodily firmness" .)