Butcher's need (7)
I believe the answer is:
cleaver
'butcher's need' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cleaver that I've seen before include "dangerous object?" , "Hatchet for chopping meat" , "Butcher's knife" , "Long-bladed hatchet" , "A butcher may use it" .)