Abe tethers wild antelope (10)
I believe the answer is:
hartebeest
'antelope' is the definition.
(hartebeest is a kind of antelope)
'abe tethers wild' is the wordplay.
'wild' indicates anagramming the letters.
'abe'+'tethers'='abetethers'
'abetethers' is an anagram of 'HARTEBEEST'.
(Other definitions for hartebeest that I've seen before include "Creature" , "African native" , "antelope" , "wild animal" , "Game" .)