Allege as fact (4)
I believe the answer is:
aver
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">allege as fact</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 "Firmly maintain" , "Declare to be the case" , "Maintain - assert - allege" , "'Affirm, assert (4)'" , "Declare or insist" .)