Mutineer (5)
I believe the answer is:
rebel
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mutineer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rebel that I've seen before include "Disobey" , "Resist authority" , "Rise up against authority" , "One who won't comply" , "revolutionary" .)