Related Clues:

• Bay Area airport code
• Tree sacred to the Druids
• One source of shingles
• Hearty tree
• Cabinet makeup, perhaps
• Winery wood
• Tree on the Lebanese flag
• Wine cask wood
• River through Waterloo
• 'Mighty' tree
• Patio furniture wood
• Wine cask material
• Might symbol
• Squirrel hangout
• Source of acorns