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Clarke also had six assists for the Razorbacks (18-11, 9-7 Southeastern Conference), who improved to 17-1 at home. Their only loss in Bud Walton Arena this season came to then-No. 6 Syracuse on Nov. 30, and they are now 33-4 at home under second-year coach Mike Anderson.
Marshawn Powell had 15 points and BJ Young added 13 for Arkansas, which snapped a two-game losing streak with the win.
Arkansas native Archie Goodwin led the Wildcats (20-9, 11-5) with 14 points, while Willie Cauley-Stein had 13 and Ryan Harrow 10.