Sheath for a sword (8)
I believe the answer is:
scabbard
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sheath for a sword</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for scabbard that I've seen before include "Something to stick the knife into" , "Holding a weapon" , "Case for a sword" , "Holder for a bladed weapon" , "One holding a sword" .)