Pig feed (5)
I believe the answer is:
swill
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pig feed</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 swill that I've seen before include "Wet pig feed" , "Wash" , "Refuse" , "drink heavily" , "Pigs' food" .)