Possible Clues:

• First Earl of Beaconsfield
• Former PM wandering in arid isle
• This British prime minister was an ideal sir
• Benjamin ..., British prime minister
• Germany needs a national prime minister
• Prime Minister, democratic leader, country's first person
• The British statesman was an ideal sir
• British prime minister and author of 'Coningsby'
• Powerful friend of Queen Victoria
• "When I want to read a novel, I write one" (––)