Antelope or Chevy model (6)
I believe the answer is:
impala
This clue is a double definition.
'antelope' is the first definition.
(impala is a kind of antelope)
'chevy model' is the second definition.
(I've seen this in another clue)
(Other definitions for impala that I've seen before include "Spectacular jumper" , "prodigious bounder" , "Big game" , "leaping creature" , "horny type" .)