Scabbard? (6)
I believe the answer is:
sheath
'scabbard' is the definition.
(I know that scabbard can be written as sheath)
This is all the clue.
(Other definitions for sheath that I've seen before include "case for weapon" , "Protective cover" , "Case for a dagger" , "Protective covering for a knife" , "Casing for a sword" .)