Act of civil disobedience (3-2)
I believe the answer is:
sit-in
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">act of civil disobedience</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 sit-in that I've seen before include "Occupation demo" , "Protest demo" , "Factory protest" , "Passive occupation of a premises" , "Seated protest" .)