Mingle, blend (3)
I believe the answer is:
mix
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">mingle</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">blend</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that blend can be written as mix)</span><br/ ><br/ ></span>
(Other definitions for mix that I've seen before include "Associate" , "'Mingle, combine (3)'" , "Amalgamate, blend" , "Mingle, blend" , "Get on" .)