Clanton finished her round on Friday with six birdies and 12 pars to finish at seven-under-par 281. That put her tied for third individually behind Caroline Hedwall of Oklahoma State who won the tournament with a 276 to finish four shots ahead of Arizona State's Johnson.
However, third-ranked Auburn's other four players struggled on Friday as the Tigers finished at 11-over-par 1,183 in a tie with Texas A&M.
Purdue was the surprise winner. The eight-ranked Boilermakers shot a one-over-par 1,153 to edge Southern Cal by a stroke.
Patricia Sanz shot a 77 on Friday and her teammates Candace Schepperle and Haley Wilson rounded out the Auburn scoring with 78s. The Tigers did not have to count an 80 from Carlie Yadloczky.