Purgative (5,5)
I believe the answer is:
epsom salts
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">purgative</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 epsom salts that I've seen before include "They should clear out!" , "a purge" , "Medicinal preparation" , "Medicine taken for heartburn and constipation" , "Purgative" .)