Possible Clues:

• Veggie on a cob
• Gosh, Beethoven's Ninth is old-fashioned stuff
• Mustard-colored kernels
• Chicken feed
• & 26 Down Stock food for fancy men dressed in pink
• Chip ingredient
• Vegetable with ears
• 'Hee Haw'-like humor
• Trite jokes falling on deaf ears?
• Unwanted 35-Across feature