Blade beheaded wild pig (3)
I believe the answer is:
oar
'blade' is the definition.
(blade is the word for oar in competitive rowing)
'beheaded wild pig' is the wordplay.
'beheaded' means to remove the first letter (the head of the word is removed).
'wild pig' becomes 'boar' (I've seen this before).
'boar' with its first letter taken off is 'OAR'.
(Other definitions for oar that I've seen before include "that may be feathered?" , "Propelling blade" , "Rower's paddle" , "propellor" , "Rower" .)