King originally exhibiting Antipodean parrot (3)
I believe the answer is:
kea
'parrot' is the definition.
(kea is a kind of parrot)
'king originally exhibiting antipodean' is the wordplay.
'king' becomes 'k'.
'originally' suggests taking the first letters.
The initial letters of 'exhibiting antipodean' is 'ea'.
'k'+'ea'='KEA'
(Other definitions for kea that I've seen before include "Green NZ parrot" , "NZ mountain parrot" , "NZ flyer" , "bird" , "Large New Zealand parrot" .)