Weapon oddly scabbarded (5)
I believe the answer is:
sabre
'weapon' is the definition.
(sabre is a kind of weapon)
'oddly scabbarded' is the wordplay.
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
The alternating letters of 'scabbarded' are 'SABRE'.
(Other definitions for sabre that I've seen before include "Type of sword" , "weapon" , "Large wasp" , "Sword (that may be rattled)" , "Heavy cavalry sword" .)