Can't stand; can't abide (6)
I believe the answer is:
loathe
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">can't stand</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">can't abide</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for loathe that I've seen before include "Find repugnant" , "Feel hatred for" , "Feel intense dislike or disgust for" , "Cordially dislike, despise" , "Dislike intensely" .)