Tony - Memphis
I would use Elmer's white. It has a decent set time and cleans up easy. Can also be undone if things go awry! I have done some similar repairs. I spent a lot of time propping the larger piece such that the break was fairly level and the part would sit there without clamps. Sometimes, a quick rub is enough for the piece to stay in place. I have also used blue tape for holding, playdo, etc. I spent more time preparing that I did gluing for sure. Sorry for the bad break. Good luck with it.