Antelope from eastern country (5)
I believe the answer is:
eland
'antelope' is the definition.
(I know this)
'eastern country' is the wordplay.
'eastern' becomes 'e'.
'country' becomes 'land' (synonyms).
'e'+'land'='ELAND'
'from' is the link.
(Other definitions for eland that I've seen before include "Large African antelope with spiral horns" , "Large spiral-horned African antelope" , "Spiral-horn antelope" , "South African antelope" , "Laden (anag.); antelope" .)