Allege (5)
I believe the answer is:
claim
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">allege</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for claim that I've seen before include "Call" , "Assert; request" , "title" , "Allege" , "State to be the case" .)