Once again, go over most of renegotiated treaties (7)
I believe the answer is:
iterate
'once again go over' is the definition.
(to iterate something is to go over it again)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for iterate that I've seen before include "Repeat, state again" , "Utter or perform repeatedly" , "Recapitulate" , "State repeatedly, say again" , "Say again, repeat" .)