Words about weapon (5)
I believe the answer is:
sword
'weapon' is the definition.
(sword is a kind of weapon)
'words about' is the wordplay.
'about' is an anagram indicator.
'words' is an anagram of 'SWORD'.
(Other definitions for sword that I've seen before include "Foil" , "Sharp weapon" , "killer?" , "Double-edged weapon" , "Brand" .)