The former England midfielder has committed himself to the club until 2029.
The fight will take place on July 24.
Clark called last year’s incident at Oakmont the “lowest point” of his career.
De Allende has been a mainstay of South Africa’s successive World Cup triumphs.
Ben Stokes announced his retirement from international cricket during the final Test against New Zealand to leave England searching for a successor.
Grant Tuer’s mare is in the form of her life.