Related Clues:

• Yam, e.g.
• Jerusalem artichoke, for one
• A starch source
• Spud, for one
• Arrowroot, e.g.
• Underground plant part
• Potato or yam, e.g.
• Taro or potato
• Potato or yam
• 124-Across, for one
• Yam or taro
• Dahlia, for one
• Yam, for one
• Potato
• A brute of a potato