Related Clues:

• It rattles in a whistle
• Split -- soup
• Insomnia cause, in a fairy tale
• Edible green seed
• Veggie on a vine
• Bean or capital
• 11-Across veggie
• 'Once Upon a Mattress' prop
• Word with chick or cow
• Shell game prop
• Stir-fry veggie
• Item in a pod
• Word with brain or shooter
• Princess' problem
• Whistle part