Newton redshirted his freshman season in 2018. In the 2019 spring practices, he was converted to a cornerback.[3] In 2019, Newton recorded 20 tackles and two pass deflections.[4] In week nine of the 2020 season, he picked off a pass by Zac Thomas for his first career interception, but the Warhawks lost to Appalachian State 31–13.[5] Newton finished the 2020 season with 16 tackles with 0.5 being for a loss, five pass deflections, and an interception.[6] In week seven of the 2021 season, he intercepted a pass off Malik Willis in a win over Liberty.[7] In week twelve, Newton made another interception in a defeat to LSU 27–14.[8] He finished the 2021 season with 48 tackles, five of them going for a loss, eight pass deflections, and two interceptions.[9] After the conclusion of the season, Newton entered the transfer portal.[10] He decided to transfer to TCU.[11]
Newton started the 2022 season off hot, as in week two he recorded his first interception with TCU, helping the Horned Frogs beat Tarleton State 59–17.[12] He recorded another interception the following week, picking off a pass by quarterback Tanner Mordecai to help TCU beat SMU 42–34.[13] In TCU's season finale, Newton returned an interception 57 yards for a touchdown, as he helped the Horned Frogs rout Iowa State 62–14.[14] Newton finished the 2022 season with 35 tackles and 2.5 being for a loss, 12 pass deflections, three interceptions, and a touchdown.[15] He earned first-team all Big-12 honors.[16] Newton was named preseason first-team all-Big 12 ahead of the 2023 season.[17][18] Newton was also named a preseason All-American by Phil Steele and Athlon Sports.[19] Clark was also named to several award watch lists, such as the Jim Thorpe Award, the Bronko Nagurski Trophy, and the Wuerffel Trophy.[20][21][22]
Newton was drafted by the Cincinnati Bengals in the 5th round (149th overall) of the 2024 NFL Draft.[25] He caught his first career interception during Week 15's road win against the Tennessee Titans.[26]