Open resistance (8)
I believe the answer is:
defiance
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">open resistance</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 defiance that I've seen before include "Hostile challenge" , "confrontation" , "Refusal to comply" , "show of rebellion" , "Challenging attitude" .)