Most worthless parts (5)
I believe the answer is:
dregs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most worthless parts</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 dregs that I've seen before include "Wine or coffee residue" , "Sediment - rabble" , "Sediment at bottom of drink" , "Bottom of the barrel" , "Liquid remnants with sediment" .)