Related Clues:

• See 51-Down
• It may require surgery
• Swing site
• It has a bark but no bite
• Kind of squirrel
• Catbird seat?
• Kind of surgeon
• Genealogical work
• Ebony or mahogany
• Birch
• Lemur's hangout
• Christmas greenery
• Nursery item
• Shoe stiffener
• Squirrel's home