Possible Clues:

• Chestnuts in company of sailors
• Foot ailment
• 'Hee Haw'-type humor
• Type of syrup or oil
• Word that can precede the start of 17- or 54-Across or 11- or 27-Down
• Muffin or chowder ingredient
• In song from 'Oklahoma' this is as high as an elephant's eye
• Unwanted 35-Across feature
• Kind of whisky
• 'Hee Haw'-like humor