Fight Pole (4)
I believe the answer is:
spar
I believe this is a double definition.
'fight' is the first definition.
(sparring is a kind of fighting)
'pole' is the second definition.
(spar is a kind of pole)
(Other definitions for spar that I've seen before include "Raps with large timber" , "Box; mineral; pole" , "Raps with large beam" , "Shadow box" , "supporting member" .)