Renounce, have nothing to do with (4,2)
I believe the answer is:
pass up
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">renounce</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">have nothing to do with</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for pass up that I've seen before include "forego" , "Neglect (an opportunity)" , "Showing neglect" , "Refuse - reject" , "Refrain from taking an opportunity" .)