Reportedly gave birth to a wild creature (4)
I believe the answer is:
boar
'a wild creature' is the definition.
(wild pig)
'reportedly gave birth to' is the wordplay.
'reportedly' shows a homophone (sound like).
'gave birth to' becomes 'bore' (as in bearing a child).
'bore' sounds like 'BOAR'.
(Other definitions for boar that I've seen before include "Uncastrated male pig" , "The head for drink Falstaff had" , "Wild swine" , "A wild male pig" , "Resting place for birds or bats" .)