Legal order (4)
I believe the answer is:
writ
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">legal order</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 writ that I've seen before include "Legal order in writing" , "Legal injunction" , "Legal summons" , "It may be served" , "Formal command of law court requiring certain action" .)