Head trainer at the Tacoma Boys Club, an amateur boxing program in Tacoma, WA, USA. Amongst the outstanding fighters developed by Clough at the Tacoma Boys Club as amateurs were:
- Leo Randolph (World Champion, and Olympic Gold Medalist)
- Rocky Lockridge (World Champion)
- Johnny Bumphus (World Champion and National Amateur Champion)
- Sugar Ray Seales (Olympic Gold Medalist)
- Dale Grant (National Amateur Champion)
- Davey Lee Armstrong (National Amateur Champion, Member of U.S. Olympic Team)
Clough was named the National AAU Amateur "Coach of the Year" in 1972, 1976, and 1977.
From 1979 until 1980 he was the head boxing coach for the Muhammad Ali Boxing Club in Santa Monica, CA, arguably the most prestigious coaching job in amateur boxing at the time.
Since the mid-1980s he has been an amateur coach around the world, primarily in Asia. He has worked as the national coach in Thailand, The Philippines, and Malaysia.