Name your weapon (3)
I believe the answer is:
rod
'weapon' is the definition.
(rod is a kind of weapon)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for rod that I've seen before include "Flexible stick for 11 Down" , "Staff" , "Old saying 'Spare the . . . and spoil the child'" , "Angler's pole" , "Wand - fishing stick" .)