Piece of asparagus (5)
I believe the answer is:
spear
'piece of asparagus' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spear that I've seen before include "Stabbing, throwing, weapon" , "Old weapon" , "Lance" , "Asparagus shoot" , "Sharp-tipped weapon" .)