Related Clues:

• Elm or oak, e.g.
• Almond or alder
• Obstacle for George of the Jungle
• Palm or plum
• Harvard Sq. site
• Pine, for one
• 35-Across, for one
• Possum's home
• Hammock support
• Surgeon's ''patient''
• Lineage chart
• Source of sap
• Forbidden fruit source
• Orchard grower
• Surgeon's patient, perhaps