Sheathed (7)
I believe the answer is:
encased
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sheathed</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for encased that I've seen before include "Covered" , "in a box" , "wrapped up" .)