Overfill (4)
I believe the answer is:
sate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">overfill</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 sate that I've seen before include "Supply to excess" , "Fill completely" , "spicy meat" , "Provide with more than enough" , "Malaysian dish" .)