Public opinion (3,6)
I believe the answer is:
vox populi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">public opinion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for vox populi that I've seen before include "Belief or sentiment shared by most people" , "Public opinion" , "Mass opinion" .)