Related Clues:

• Plywood source
• Picnic shader, perhaps
• See 28 Across
• Massachusetts symbol
• Pine relative
• Tree with tough, useful wood
• Yule tree
• Conifer
• Barrel material
• Hackberry, e.g.
• Terrorized street of film
• Street in some movies
• Ever-green
• Shady street
• Chalet building material