Possible Clues:

• Doughnut-shaped solid
• Architectural moulding American discovered by hill
• Shape of doughnut
• Cheerios shape
• Receptacle actor uses for part
• Moulding to go brown with the passage of time finally
• Ring shaped like doughnut with hole
• Ring up with nonsense on America
• Moulding at the base of a column
• Geometrical solid