Stubbornness (8)
I believe the answer is:
obduracy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stubbornness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for obduracy that I've seen before include "Refusal to give in" , "Mulishness" , "Stubbornness" .)