Agree Leonardo's last section has been enciphered? (8)
I believe the answer is:
coincide
'agree' is the definition.
(coinciding is a kind of agreeing)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for coincide that I've seen before include "agree" , "Occur simultaneously" , "Happen together" , "Happen at the same time in unplanned way" , "Show correspondence" .)