Related Clues:

• Ash, e.g.
• Rolling Stones guitarist
• Christmas symbol
• Copse
• Squirrel's hangout
• Madrone or magnolia
• Genealogical diagram
• Oak or pine
• It has bark but no bite
• Hierarchical chart
• Cherry, e.g.
• Squirrels' hangout
• Swing support, perhaps
• It's stuffed with wood
• Cherry or chestnut