CLEMSON — Gainesville graduate Deshaun Watson threw for three touchdowns and No. 2 Clemson avoided a host of mistakes — including an embarrassing early celebration punt-return gaffe by Ray-Ray McCloud that cost a TD — to hold off pesky Troy 30-24 on Saturday. The Tigers (2-0) were out of synch on offense and could not break away from the Trojans (1-1) until the fourth quarter.