Related Clues:

• Kind of slick
• Canadian resource
• Source of Rockefeller's wealth
• "Fill 'er up" filler
• Gusher flow
• Lot of fun, slangily
• Slick material
• Many a MoMA piece
• Upton Sinclair novel
• Interstate sign word
• Rockefeller's biz
• Supply for regular customers?
• It's between E and F?
• The ''it'' in ''Step on it!''
• Type of stove