Related Clues:

• Arboretum purchase
• Elm or eucalyptus
• Oxygen producer
• Olive or apple
• Christmas centrepiece
• Orange or oak
• What dendro- means
• Fruit bearer
• Place for a house
• Yuletide buy
• Oak, e.g.
• Elm, for one
• Back into a corner
• Possessor of many rings
• See 26 Down