Debauched party (4)
I believe the answer is:
orgy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">debauched party</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 orgy that I've seen before include "Bacchanalian party" , "Rumpy-pumpy party" , "overindulgence" , "Riotous celebration" , "Drunken revelry" .)