Related Clues:

• Smoothing tool
• The Spirit of St. Louis, e.g.
• Flat surface
• Shaver
• Wood shaver
• Boeing output
• Frequent flier
• 747, say
• 757 or 767
• Geometry subject
• 2-D region
• Smooth out
• Evening thing
• Deciduous tree
• 'Snakes on a --'