Pleasing sound (7)
I believe the answer is:
euphony
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pleasing sound</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 euphony that I've seen before include "Pleasing sound" , "Music to one's ears" , "Sounding nice" , "sounds good" , "Pleasantness of sound" .)