Formally accuse or charge (6)
I believe the answer is:
indict
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">formally accuse</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">charge</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(indicting is a kind of charging)</span><br/ ><br/ ></span>
(Other definitions for indict that I've seen before include "Accuse with a crime (US)" , "Make charge against an accused person" , "Charge (someone) with serious crime" , "Accuse of crime in court" , "Accuse - sounds like 2 Across" .)