Related Clues:
- Graduating student's headwear
- Upper bound
- Put a ceiling on
- Bottle topper
- With 13-Down, they go off with a bang
- Mushroom top
- Yankees uniform item
- Bit of dental work
- Ball-player's headgear
- Small explosive
- Keep from increasing
- Souvenir shop purchase
- Twist-off thingy
- Team spending limit on player salaries
- Maximum level