Related Clues:

• Tall trees
• Shady arbor, perhaps
• Street prettifiers
• Source of shade
• Backyard spreaders
• Boulevard liners, sometimes
• Colonnade lineup
• Shady giants
• Shady group
• Spreading trees
• Elegant shade trees
• They are especially graceful when they leave?
• Some trees
• Majestic trees
• Big spreaders