AMES, Iowa (AP) — Senior Will Clyburn scored 20 points and Iowa State beat No. 13 Oklahoma State 87-76 on Wednesday night to bolster its NCAA tournament hopes. Georges Niang added 18 points for the Cyclones (20-10, 10-7 Big 12), who notched just their second victory over a ranked opponent. Oklahoma State trailed by as many as 15 points, but Marcus Smart’s reverse dunk made it 70-68 with 4:28 left. Clyburn answered with a 3 and Tyrus McGee’s 3 a minute later put the Cyclones ahead 78-68.