Attested to (9)
I believe the answer is:
witnessed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">attested to</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for witnessed that I've seen before include "Seen" , "Saw" .)