Defeatist, contradictory (8)
I believe the answer is:
negative
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">defeatist</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">contradictory</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 negative that I've seen before include "thumbs down" , "Less than zero quantity" , "Opposite of affirmative" , "veto" , "Expressing or implying denial or refusal" .)