Bears witness (7)
I believe the answer is:
attests
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bears witness</span>' is the definition.<br/ ><span class="explanation-format__explanation">('attest' can be a synonym of 'bear witness')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for attests that I've seen before include "Gives evidence in court" , "Bears witness" , "Sat test (anag.)" , "Certifies" , "Authenticates or affirms to be true" .)