Gradually slowing, in music (8)
I believe the answer is:
lentando
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gradually slowing in music</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 lentando that I've seen before include "Slowing down" , "making things go slowly" .)