Oscar winner Charles's cycling assault (9)
I believe the answer is:
onslaught
'assault' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for onslaught that I've seen before include "Aggressive action" , "Fierce attack" , "Hunt goals (anag) - offensive" , "Heavy attack" , "Assault" .)