Last little bit (4)
I believe the answer is:
dreg
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">last little bit</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 dreg that I've seen before include "Small quantity (of residue?)" , "Small amount left over" , "Trace" .)