Board needs agreement from two countries (5)
I believe the answer is:
ouija
I believe this clue is a double definition.
'board' is the first definition.
(Ouija board is an example)
'agreement from two countries' is the second definition.
(Yes in French Oui and German Ja)
'needs' is the link.
(Other definitions for ouija that I've seen before include "This board is used in spiritualistic sessions" , "Type of board used in seances" , "- Board may be used in a seance" , "This board is used in spiritualist proceedings" , "Board used in spiritualist session" .)