Swears (to) (7)
I believe the answer is:
attests
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">swears to</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for attests that I've seen before include "Certifies" , "Sat test (anag.)" , "Gives evidence in court" , "Bears witness" , "Confirms" .)