Musical postscript
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">musical postscript</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 coda that I've seen before include "End piece written for a musical work" , "Closing bars (mus.)" , "End piece written for a piece of music" , "Closing stage" , "Word that modifies" .)