The answers to clues below are familiar phrases - except that they each contain the same additional letter.

1. Condition of a hypnotist lacking spelling ability
2. What the crush of journalists ate at the deli
3. Hygiene announcement before a flag raising ceremony

HINT:
The additional letter is N.

Answers:

1. Without a trance
2. Media blintzes 
3. "Will the audience please rinse?"

Credit:
1-2: Jack McInturff