International accord (7)
'international accord' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for entente that I've seen before include "Diplomatic agreement" , "International understanding" , "friendly relations" , "Informal alliance" , "Teen ten involved in friendly understanding between countries" .)
(Other definitions for treaty that I've seen before include "something of Rome or Versailles?" , "Ratified agreement between states" , "Covenant" , "Deal?" , "Formal agreement between two or more countries" .)