Door rapper (7)
I believe the answer is:
knocker
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">door rapper</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 knocker that I've seen before include "It bangs on a door" , "Something on door; one continually finding fault" , "means to announce house call" , "Alternative to door bell" , "Hinged device on a door" .)