Beast coming in first again (4)
I believe the answer is:
stag
'beast' is the definition.
(stag is a kind of beast)
'coming in first again' is the wordplay.
'coming in' indicates the answer is hidden within the clue.
'STAG' is hidden within 'first again'.
(Other definitions for stag that I've seen before include "Adult male red deer" , "Antlered animal" , "party given by Uncle Sam" , "Excluding women" , "Share speculator" .)