Declare positively
I believe the answer is:
aver
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">declare positively</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for aver that I've seen before include "Declare to be the case" , "protest" , "State firmly, maybe rave" , "State; say" , "claim" .)