Do well-spoken two score for the Romans? (5)
I believe the answer is:
excel
'do well' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for excel that I've seen before include "cap" , "Be outstanding" , "Do better than, give great performance" , "Perform outstandingly well" , "Perform extremely well" .)