Spurn or slight (6)
I believe the answer is:
ignore
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">spurn</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">slight</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for ignore that I've seen before include "Discount" , "Deliberately take no notice" , "Fail to notice (6)" , "Pass over" , "Brush off" .)