In a box (6)
I believe the answer is:
crated
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in a box</span>' is the definition.<br/ ><span class="explanation-format__explanation">(crate is a type of box)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for crated that I've seen before include "ready to be dispatched" , "Boxed" .)