Blade, its furthest tip slicing through wooden pole (5)
I believe the answer is:
spear
'blade' is the definition.
(thesaurus)
'through wooden pole' is the wordplay.
'through' is an insertion indicator.
'wooden' becomes 'e' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'pole' becomes 'spar' (spar is a kind of pole).
'e' inserted within 'spar' is 'SPEAR'.
'its furthest tip slicing' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for spear that I've seen before include "Impale" , "Shafted weapon for throwing or thrusting" , "Javelin or harpoon" , "Lance" , "Stabbing, throwing, weapon" .)