In 1966, he was a member of an advisory committee to the military governor of the Mid-Western Region province, David Ejoor and was appointed Federal Commissioner of Information in 1975.
He attended primary and secondary schools at Effurun, Okrika and Afugbene before completing further studies at the Government Teacher Training College, which later became Delta State University, Abraka.
Clark's involvement in the political process began during the pre-independence period when he was elected as Councillor for Bomadi in 1953.
After the military coup of January 1966, Clark was among a group of delegates from the Mid-West who opposed any ideas of confederation that were raised at an ad-hoc constitutional conference set up by Gowon in 1966.
As commissioner for education, he was active in the establishment of a Mid-west College of Technology that became the foundation of the University of Benin.