Person on trial (9)
I believe the answer is:
defendant
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">person on trial</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for defendant that I've seen before include "Against whom an action is brought in a law court" , "The one before the court" , "Person accused" , "One charged" .)