Crossword clues for the word: UPTONSINCLAIR The word UPTONSINCLAIR has appeared as an answer to at least 3 crossword clues on different crossword puzzles. Crossword clues for UPTONSINCLAIR Showing 1 to 3 of 3 results Clue(s) "He wrote ""The Jungle""" "The Jungle" author Muckraker whose 1906 novel "The Jungle" exposed conditions in Chicago's meatpacking industry: 2 wds.