The phrase "to agree a settlement" means to reach an agreement or an arrangement between two or more parties involved in a dispute or conflict, usually regarding a financial or legal matter. Full definition
In mediation, parties can agree the settlement outcome, instead of having a judgment handed down by court. (lawyer-monthly.com)
If the paying party does not agree settlement on a provisional damages basis then the injured person would need to issue court proceedings to seek a determination by a court as to whether there will be an order for provisional damages. (mooreblatch.com)
They argue that without proper (and expensive) preparations for the reintroduction of borders, such as customs points and truck parks, the U.K. has no fall - back position if it can't agree a settlement with the EU. (fortune.com)