Causing vomiting (6)
I believe the answer is:
emetic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">causing vomiting</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 emetic that I've seen before include "Medicine designed to make one vomit" , "making you throw up" , "Nauseous" , "A medicine to induce nausea" , "Substance given to make one vomit" .)