Corroborated (9)
I believe the answer is:
confirmed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">corroborated</span>' is the definition.<br/ ><span class="explanation-format__explanation">('confirm' can be a synonym of 'corroborate')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for confirmed that I've seen before include "Verified" , "Stated with assurance that something was true" .)