A little night music (4)
I believe the answer is:
taps
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a little night music</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 taps that I've seen before include "They're faucets in America" , "Military bugle call at dusk" , "Uses listening devices" , "Knocks gently" , "Military signal to turn the lights out" .)