Feeling of disgust (6)
I believe the answer is:
nausea
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">feeling of disgust</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 nausea that I've seen before include "Condition of feeling imminent sickness" , "Feeling of imminent sickness or upset stomach" , "Feeling of sickness or disgust" , "Sickness, biliousness" , "Sick feeling" .)