Related Clues:

• Aspen, for one
• Ygdrasil or rowan
• Apple, plum or pear, e.g.
• Yggdrasil, e.g.
• Almond, e.g.
• Koala's hangout
• Genealogist's drawing
• Pre-Christmas buy
• See 57 Across
• See 38 Down
• ___ toad (kind of frog)
• Dryad's dwelling
• Maple or mahogany
• Oak or apple
• Apple or pear, e.g.