Related Clues:

• Kind of slick
• Navel orange's lack
• Garden planting
• Canadian resource
• Source of Rockefeller's wealth
• Gusher flow
• Parrot morsel
• Slick material
• Many a MoMA piece
• Upton Sinclair novel
• Apple pip, e.g.
• Rockefeller's biz
• Parrot snack
• ''Crude'' fuel
• Product of a field of dreams?