Get wrong (13)
I believe the answer is:
misunderstand
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">get wrong</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for misunderstand that I've seen before include "Get the wrong end of the stick" , "Fail to follow" , "Take wrongly" , "Make little of" , "fail to get clear" .)