Possible Clues:

• Backyard play area
• Suspect here to exploit a leafy hideaway
• Branch office?
• Backyard hideout (Note this answer's last two letters + ...)
• Offers playful residence in the forest to one of those up against The Branch
• Spruced-up abode?
• Branch headquarters?
• Kids' secret club meeting place
• Building in the branches
• Children's play space in the branches