He was born in Allisona, Williamson County, Tennessee to Joseph Poindexter and Cora Belle Waddey.
In 1917, he returned to private law practice in Atoka, where he remained until he won election to the Oklahoma Supreme Court in 1924, filling a vacancy and taking office in 1925.
[5][6] After returning to private practice for a time, Clark again ran for a seat on the court in 1938,[7] but was not elected.
Justice Clark married Anna Paullin in Durant, Oklahoma on May 1, 1917.
[2] Clark died in Denison, Texas, where he had been hospitalized for a kidney ailment.