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

1. Subways, buses, and trains - theoretically
2. Gutzon Borglum masterpiece
3. Phone feature
4. Military credo
5. Exclusive Harvard club
6. All souls, Biblically
7. What political candidates do
8. Common palindrome
9. Specialized emergency responders
10. In dreamland

Answers:

1. Rapid transit
2. Mount Rushmore
3. Speed dial
4. Hurry up and wait
5. Hasty Pudding
6. The quick and the dead
7. Run for office
8. Race car
9. Swiftwater rescue
10. Fast asleep

Credit: NY Times Crossword
Frances Hansen
RAPID TRANSIT