[2] Playing for Gloucester, Clark made a try scoring first-team Premiership Rugby debut in a win over Worcester Warriors in September 2022.
[3] Clark captained Gloucester in the Premiership Rugby Cup at the start of the 2023–24 season and later in that competition came off the bench as they defeated Leicester Tigers in the final to lift the trophy.
[6] After making one appearance for Quins he returned to Gloucester and started in the 2023–24 EPCR Challenge Cup final at Tottenham Hotspur Stadium which saw them defeated by Sharks to finish runners up.
[8] Clark played for the England U20 side in all five of their games during the 2021 Six Nations Under 20s Championship as they completed a junior grand slam at Cardiff Arms Park.
[12][13] In January 2025, following an injury to Alex Coles, he was called-up to the senior England squad ahead of the opening game of their 2025 Six Nations Championship against Ireland.