Antelope hasn't finished dash (4)
I believe the answer is:
elan
'dash' is the definition.
(I know that dash can be written as elan)
'antelope hasn't finished' is the wordplay.
'antelope' becomes 'eland' (eland is a kind of antelope).
'hasn't finished' means to remove the last letter.
'eland' with its last letter taken off is 'ELAN'.
(Other definitions for elan that I've seen before include "Flair and dash" , "fizz" , "Vigour, style, enthusiasm" , "French flair" , "Dashing style" .)