Spear a funny fellow? Exactly! (7)
I believe the answer is:
harpoon
'spear' is the definition.
(I know that harpoon is a type of spear)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for harpoon that I've seen before include "Whaling weapon" , "Barbed missile" , "Barbed whale-spear" , "Whaler's spear" , "Type of spear" .)