Cleveland had squandered 22-point lead before Hood’s basket put them up for good with 23 seconds left.
Cleveland closes first period with 18-3 run.
Cleveland also gets forward John Henson, two draft picks; team gives up George Hill, Sam Dekker.
Clarkson scores 26 points, Sexton adds 23 for Cavaliers.
Cleveland’s Tristan Thompson scores 19 points and pulls down 14 rebounds.
Boston scored 39 points in third period to pull away.