Two-sided (9)
I believe the answer is:
bilateral
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">two</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">sided</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for bilateral that I've seen before include "Two-sided" , "Undertaken by two parties" , "Involving two parties" , "involving more than one party?" , "involving two sides" .)