Jeff Green will not land Monroe. Need to include at least one more piece.
Like what, a future draft pick?
Yeah or something similar and probably more than the Clippers pick. Bradley might also count, but he is a bit repetitive for them and is expiring so I don't think they would value him as much as other teams.
Monroe is younger, better, and plays at a more difficult position to fill than Green. Sure he is expiring, but he is a restricted free agent which gives matching rights, so there is no chance of him walking for nothing unless you just don't want to pay him. He has way more value than Jeff Green.
I think something like this might work for both teams (assuming Boston will match any contract for Monroe)
Green, Bass, Olynyk, Clippers pick
for
Monroe, Jerekbo, Villanueva