The answers to the clues below will have something in common.

1. Irving Berlin classic (from Holiday Inn)
2. Nathaniel Hawthorne classic
3. Lucy Maud Montgomery classic
4. Classic metaphor for a small beginning
5. Rhymes with and is a lustrous hue
6. What Little Jack Horner did

Answers:

1. "White Christmas"
2. The Scarlet Letter
3. Anne of Green Gables  
4. Mustard seed
5. Peacock blue
6. Pulled out a plum

What they have in common:

Each answer contains the name of one of the characters in CLUE:

Mrs. White
Miss Scarlett
Mr. Green
Colonel Mustard
Mrs. Peacock
Professor Plum

Credit: NY Times Crossword
May 3, 1998
Brendan Emmett Quigley
THE USUAL SUSPECTS