A right-handed middle-order batsman, Clark made his first-class debut for Middlesex against Cambridge University in June 1959, scoring 25 in the first innings and 100 not out, in two hours, in the second.
Wisden described him as "a splendid batsman, with a fine temperament" and a "readiness to play strokes", and added that his "121 and 73 not out against Northamptonshire when Middlesex were in difficulties showed his fighting qualities".
[2] A back injury restricted his appearances in 1960[3] but he returned to fitness in 1961, made 1335 runs at 26.70,[4] and was awarded his county cap.
He made 1154 runs at 28.85 in 1962, and in the last match of the season, bowling a longer spell than usual with his left-arm medium pace, took 5 for 69 against Kent.
With MCC teams he toured Canada and the United States in 1967,[9] East Africa in 1973-74,[10] and Hong Kong, Singapore and Thailand in 1981.