Byzantine agreement implies Broadcast channel [Consesus]
Note that if the dealer in broadcast is corrupted, then we don't need to guarantee anything except that all honest parties agree on the output. In contrast, if the dealer is honest, then all honest parties must output the dealer's input. Now, think about what happens if the dealer is instructed to send its input first to all parties over the point-to-point channel. What can the parties do after receiving this message (note that a corrupted dealer can send different values to different parties)? How can they ensure the properties... Of course, you should use agreement. I think that this is more than enough of a hint.