SYRACUSE, N.Y. — As the celebration in the Syracuse locker room reverberated through the walls of the Carrier Dome, Clemson coach Dabo Swinney winced a little bit, dreams of a perfect season lost in a sea of orange. Eric Dungey threw for 278 yards and three touchdowns, Cole Murphy kicked a tie-breaking field goal in the fourth quarter, and Syracuse stunned No. 2 Clemson 27-24 on Friday night to put a damper on the Tigers’ hopes of repeating as national champions. Down maybe, but not completely out. The Tigers (6-1, 4-1 ACC) won the national championship last season despite a loss during the season to Pittsburgh. “Every goal is there for this team,” Swinney said.