Animal from eastern territory (5)
I believe the answer is:
eland
'animal' is the definition.
(eland is a type of antelope)
'eastern territory' is the wordplay.
'eastern' becomes 'e'.
'territory' becomes 'land' (land is a kind of territory).
'e'+'land'='ELAND'
'from' is the link.
(Other definitions for eland that I've seen before include "Largest living antelope" , "Spiral-horn antelope" , "Wild beast" , "Led an (anag) -- antelope" , "Antelope seen by Africans" .)