didn't fail (6)
I believe the answer is:
passed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">didn't fail</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for passed that I've seen before include "Was successful" , "Examined and declared satisfactory" , "Chose not to bid" , "Gone" , "overtaking?" .)