Lack of consensus (12)
I believe the answer is:
disagreement
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lack of consensus</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 disagreement that I've seen before include "Argument" , "Contretemps" , "Conflict" , "Quarrel" , "Lack of consensus" .)