Weapon wielded economically? (3)
I believe the answer is:
axe
'weapon' is the definition.
(axe is a type of weapon)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for axe that I've seen before include "Guitar" , "Abandon project or cut back on resources" , "Cutter" , "Cut costs or staff drastically" , "Do away with" .)