Thug or lout (8)
I believe the answer is:
hooligan
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">thug</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">lout</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for hooligan that I've seen before include "Destructive or badly-behaved youth" , "Tough" , "Lawless type" , "Undesirable" , "Antisocial rough" .)