NY Times Crossword
March 21, 2016
Michael Hawkins

The answers to the first five clues below have something in common. The sixth clue has the same thing in common -  and is also a hint to what it is.

1. Likeliest time for a traffic jam
2. #1 record, for example
3. Rubbish pile
4. It's at the end of the line
5. Ritz-Carlton, for one
6. Top secret

Answers:

1. RUSH HOUR
2. SMASH HIT
3. TRASH HEAP
4. FISHHOOK
5. POSH HOTEL
6. HUSH HUSH - All the answers contain SHH.