Order to appear in court (7)
I believe the answer is:
summons
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">order to appear in court</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 summons that I've seen before include "Call to join" , "orders" , "Order to appear in law court" , "Calls to appear" , "Legal order" .)