Sound at the door (3)
I believe the answer is:
rap
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sound at the door</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 rap that I've seen before include "taken by those held to blame?" , "Sort of music" , "Hit - "songs" by Snoop Dogg and Jay-Z, say" , "Form of music with spoken lyrics" , "Knock sharply" .)