The answers below will have something in common.

1. Symbol of reliability
2. Prehistoric English observatory
3. Misers
4. Start over metaphor
5. Boxer's asset
6. Status quo advocate
7. Denver neighbor
8. Not far
9. It rules the world
10. Famed golf course near Carmel, California

Answers:

1. Rock of Gibraltar
2. Stonehenge
3. Skinflints
4. Clean slate
5. Granite jaw
6. Don't rock the boat
7. Boulder, Colorado
8. Stone's throw away
9. The hand that rocks the cradle
10. Pebble Beach 

Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
THE HARD STUFF