One holds a sword (6)
(Other definitions for sheath that I've seen before include "coat" , "jacket" , "Condom" , "Covering for blade" , "Protective cover" .)
(Other definitions for scabbard that I've seen before include "Sheath for sword or dagger" , "Weapon held here" , "Something to stick the knife into" , "Brand protector" , "One holding a sword" .)