Possible Clues:

• Sir Clive, at first in trouble, accepts 50% of Sugar's backing
• "Arrowsmith" Pulitzer decliner Lewis
• Upton --, American novelist and social reformer (1878-1968)
• Oil and gasoline giant
• Upton ____’s 1906 book The Jungle was about meat-packing workers, but created more concern about food safety
• Sir Clive --, British inventor and entrepreneur
• Upton --, 1878-1968, US novelist
• Petroleum company with a dinosaur logo
• Upton __, author of The Jungle (1906)
• -- Lewis, winner of the 1930 Nobel Prize in Literature; author of the novel 'Main Street'