The Spiders led 56-53 when Anderson stole the ball from Mark Tyndale and scored on a layup with 34 seconds to play. The Owls got within two, but Anderson hit four free throws and David Gonzalvez two in the closing seconds.
Gonzalvez led the Spiders with 20 points and Kevin Smith had 13.
Clark had a career-high 18 points for the Owls and has hit 10 of 16 3-point shots in his last two games. Dionte Christmas added 14 points and Tyndale 11.
