Bisect, cut across (9)
I believe the answer is:
intersect
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">bisect</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">cut across</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for intersect that I've seen before include "Cut across" , "Divide into parts" , "making one cross" , "Criss-cross" , "Meet at a point" .)