Arm with a stick (3)
I believe the answer is:
rod
This clue is a double definition.
'arm' is the first definition.
(rod is a kind of arm)
'a stick' is the second definition.
(I've seen this before)
'with' acts as a link.
(Other definitions for rod that I've seen before include "axle" , "Cane - shaft" , "An angler's stick" , "Fishing pole" , "Stick - measure" .)