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