As a young aspiring pee-wee I thought his style was the coolest. I found out his birthday - August 13th - was one day before mine and always went looking for his hockey card whenever a new season came around.
Clarke was selected 17th by the Flyers in the second round of the 1969 draft, but he had diabetes - his achilles heel. With the help of trainers he put together a sugar diet and began drinking a bottle of Coca-Cola with three spoonfuls of dissolved sugar before each game. Between periods he downed half a glass of orange juice with sugar added, and kept chocolate bars and a tube of 100% glucose stashed nearby just in case.
Here's an interview with the CBC's Brian McFarlane from the 1976 Super Series, a string of exhibition games played between USSR Red Army and 8 NHL teams.