Possible Clues:

• One of the veggies getting boat to turn back
• Vegetable naval base raised
• Vegetable of smart appearance when topped
• Veggie that sounds like a plumbing problem
• Vegetable paired with potato in a soup
• Vegetable found in river close to Murmansk
• Potato accompanier in soup
• What the French call 'poor man's asparagus'
• Vegetable related to the negi
• Clients out of nickel, steel for a symbol of Welshness