Clement was an Olympic 1500 m finalist coming fifth at the 1976 Games in Montreal in a time of 3:39.65. He was also fourth in the 1978 Commonwealth Games in Edmonton.
In 1973 Clement achieved success in the European Cup final which he won in a time of 3:40.8, defeating future Olympic bronze medalist Paul-Heinz Wellmann and 1974 European champion Klaus-Peter Justus. He also won the 1973 World Student Games (Universiade) 1500m in a time of 3:42.32 defeating the top American runner Tony Waldrop. Clement was a UK 1,500 metres and mile record holder in the 1970s and won the Emsley Carr Mile in 1973 and again in 1974. Clement also won the AAA 1,500 metres title in 1972.
Clement improved the British record for 1,500 metres in 1974 to 3:37.4. He set British mile records of 3:54.95 in 1975 and 3:54.2 in 1978. Clement recorded his fastest time for 1,500 of 3:35.66 in 1978. His other personal bests included: 800 metres – 1:45.76; 1,000 metres - 2:19.81 (1975); 2,000 metres - 5:02.8 (1978).
After retiring from competitive athletics, Clement worked for 26 years for Glasgow City Council, where he was race director of the Glasgow Women's 10,000m.[2]
