### Clue: Upcoming event in which tri-champ and rider explode into action? (4,2,4,2,8)
### Answer: PRIX DE L’ARC DE TRIOMPHE 
 ### Explanation: Definition: Upcoming event
 **Anagram of**(… into action) [TRI-CHAMP **plus**(and) RIDER EXPLODE].
Defn: The second most prestigious horse race, to be run this Sunday in Paris. And refer to preamble about tri-champ attempt.