Possible Clues:

• Rook gets something to eat, an edible root
• Red vegetable
• Salad ingredient right with one kind of food
• The root of what's red for the artist to eat (6)
• That ruddy picture was done by him on the flat
• Root for salad
• Girl's impetuous about salad vegetable
• Vegetable plate depicted by artist
• Edible small root
• Cut the top off what's red and the rest is 6 down