Disloyal person (7)
I believe the answer is:
traitor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">disloyal person</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 traitor that I've seen before include "Judas" , "defector?" , "Not a good subject" , "Betrayer, quisling" , "One betraying one's country" .)