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

1. 800 number, for example
2. Nickname for Elizabeth I
3. Stay in bed until lunchtime
4. 1950's comedy duo
5. 1955 movie made by #5
6. Large, often glossy volume displayed in full view

Answers:

1. TOLL FREE CALL
2. GOOD QUEEN BESS
3. SLEEP TILL NOON
4. ABBOTT AND COSTELLO
5. (ABBOTT AND COSTELLO) MEET THE MUMMY 

Each of the answers has three sets of double letters.

Credit:
Merl Reagle
TRIPLE DOUBLES