Form of protest (3-2)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">form of protest</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 sit-in that I've seen before include "Type of demo" , "Act of civil disobedience" , "Occupation of a place as a protest" , "Form of civil disobedience" , "Occupation of building as form of protest" .)