Cracked (6)
I believe the answer is:
solved
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cracked</span>' is the definition.<br/ ><span class="explanation-format__explanation">(like a police case or a puzzle)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for solved that I've seen before include "Found a solution" , "Cracked" , "Puzzled out" , "Discovered the answer to a puzzle" , "Worked out, this clue say" .)