Spike not good after tip removed from pointed spear (7)
I believe the answer is:
harpoon
'spear' is the definition.
(I know that harpoon is a type of spear)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for harpoon that I've seen before include "Whale-hunting spear" , "whaling equipment" , "Spear with a line attached for fishing" , "Barbed whale-spear" , "Spear for old whaler" .)