Assert without proof (6)
I believe the answer is:
allege
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">assert without proof</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 allege that I've seen before include "Claim, suggest" , "Declare without being able to prove" , "Swear" , "Aver - maintain" , "State as a fact without proof" .)