Assertion, contention (5)
I believe the answer is:
claim
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">assertion</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that claim is a type of assertion)</span><br/ ><br/ >'<span class="explanation-format__original">contention</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for claim that I've seen before include "Take" , "Right; demand this" , "Cause the loss of (a life)" , "Assertion; demand" , "Allegation" .)