Related Clues:

• Core of an ear
• River, city or state
• Caucus site
• It lies between the Mississippi and the Missouri
• The Hawkeyes of the Big Ten
• Cookout throwaway
• ''Field of Dreams'' locale
• See 6 Across
• Skunk River state
• Sioux City setting
• Straw poll setting
• Cygnet's sire
• Part that's not eaten
• Harness horse
• "The Music Man" setting