Kind of corporal (5)
I believe the answer is:
lance
'kind of corporal' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lance that I've seen before include "A horse soldier's spear" , "corporal may have at the front" , "Clean (anag) -- weapon" , "Surgical knife" , "Knightly weapon" .)