Related Clues:

• Brooding mother
• Halloween costume
• Old crone
• It works to have a nest egg
• Chick's mother
• Mother ptarmigan, e.g.
• Beldam
• Layer?
• Clutch producer?
• See 97-Across
• Farm clucker
• Witch, to Shakespeare
• Egg layer
• Natural incubator
• Halloween figure