Early crash in a race (5)
I believe the answer is:
relay
'race' is the definition.
(relay race)
'early crash' is the wordplay.
'crash' is an anagram indicator.
'early' anagrammed gives 'RELAY'.
'in a' acts as a link.
(Other definitions for relay that I've seen before include "track event" , "Broadcast" , "Pass on - put down again" , "Hand, pass on" , "Team of workers" .)