The worst of the worst? (5)
I believe the answer is:
dregs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the worst of the worst?</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 dregs that I've seen before include "Wine sediment" , "Residue of drink" , "Fluid remnants" , "Remnant of drink" , "Wine or coffee residue" .)