Related Clues:

• Bay Area airport code
• Tree sacred to the Druids
• Hearty tree
• Cabinet makeup, perhaps
• Winery wood
• Wine cask wood
• 'Mighty' tree
• Wine cask material
• Squirrel hangout
• Source of acorns
• Tree with acorns
• Common furniture wood
• Material for some 59 Down
• Iowa's tree
• Oklahoma's ___ Tree National golf course