Musical, melodic (7)
I believe the answer is:
tuneful
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">musical</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">melodic</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for tuneful that I've seen before include "Harmonious" , "Melodious" , "Euphonic" , "With a pleasing musical sound" , "Euphonious" .)