Mock serenade (9)
I believe the answer is:
charivari
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mock serenade</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 charivari that I've seen before include "dreadful row" , "Mock serenade" , "Confused noise" , "racket!" , "Noisy welcome" .)