Black antelope’s last spring (4)
I believe the answer is:
jete
'spring' is the definition.
(I've seen this before)
'black antelope's last' is the wordplay.
'black' becomes 'jet' (similar in meaning).
'last' says to take the final letters.
The last letter of 'antelope' is 'e'.
'jet'+'e'='JETE'
(Other definitions for jete that I've seen before include "Jump" , "spring" , "movement" , "Dance manoeuvre" .)