Possible Clues:

• Friend on "Friends"
• One who wrote stories about boxer's trainer
• Name put in coat from clever retailer
• Conservative has to manage radical writer
• Author's name held in little credit
• Dealer caught by officer in charge of dog
• US-born, London-educated crime writer Raymond ___, d. 1959
• Raymond's name held in little credit
• Surely not the novelist who spotted a wobble?
• Credit covers worker with the French boat supplier