Related Clues:

• Places to brood
• It's often out on a limb
• Egg setting
• Bird's dwelling
• Peeping spot
• Cozy abode
• Home of straw, maybe
• Branch home
• Places for 56-Across
• Fledgling's place
• Aerie, e.g.
• Fits one inside the other
• Swift production?
• Homes in trees
• Fledgling's home