LA Times Crossword
September 11, 2019
Ed Sessa

The answers to the clues below will have something in common. Clue #4 has a twist. The answer to Clue #5 is a hint to the theme of the first four answers.

1. Psychedelic decorative light
2. Completely alcohol free
3. Structure renamed for a President in 1947
4. New York waterway
5. Proverbial warning to people living in glass houses

Answers:

1. Lava lamp
2. Stone sober
3. Boulder Dam
4. Hudson River 
5. They shouldn't throw stones. Each answer contains a kind of ROCK.