Unlawfully (9)
I believe the answer is:
illegally
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unlawfully</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 illegally that I've seen before include "In a way that breaks the law" , "unlawfully" , "Lawlessly" , "in a criminal manner" , "breaking the rules" .)