Possible Clues:

• Keller's "miracle worker"
• Mikado composer
• The S of G&S
• Heavyweight champ, 1882-92
• Sir Arthur offered us vanilla, not a medley
• Variety show host Ed
• Comedy writer John ____ created Citizen Smith and Only Fools and Horses
• Gilbert's partner seen in foreign villa in blazer
• Sir Arthur --, composer who wrote in collaboration with the librettist W.S. Gilbert
• English composer having a very bad upset featured in tabloid