Clayton Gross was a boxing promoter and manger in Spokane during the mid 1940s, along with his father Orien Gross Sr. and brother Orien Gross Jr. The Gross family's promotional company was the Victory Boxing Club, which promoted boxing in Spokane from August 1943, until the end of 1947. As is the case with many promoters, Gross would dabble with managing of his families promotional interests, with some ambiguity.
The Gross family operation fell apart in late 1947, due to bad attendance, and an incident where Al Morse, who ran the most respected gym in Spokane, refused to allow Gross fighters in his gym in November 1947. Shortly after this the Gross family left the boxing game in Spokane.