Clarify; resolve (5,2)
I believe the answer is:
clear up
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">clarify</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">resolve</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for clear up that I've seen before include "Get better" , "Straighten out" , "Resolve" , "Sort out" , "iron out" .)