Related Clues:
- Unnamed source
- With 27-Across, combination punch
- Opening number?
- With 34-Down, kayo combination
- A quarter of four?
- Loneliest number
- Air Force follower
- Solitaire quorum
- With 51-Down, a common tennis score
- Ace, sometimes
- Something for the books
- The first cardinal?
- Liftoff preceder
- Word on a dollar
- Hydrogen's number