Possible Clues:

• In big house, working to hold small celebration
• After welcome there's little point making celebration
• House is setting for the whole small Northern horror film
• Bradbury's lineage?
• Everyone's in debt when there's a female around — when there's witches around!
• Annual event for women no one's paid to enter
• Greeting we mostly end for annual celebration
• Night when Linus waits for the Great Pumpkin
• Greeting little children finally when they make demands on the doorstep?
• One way to greet Little N at the end of October