Related Clues:

• Gowns' companions
• Graduation ceremony hats
• Gowns' go-withs
• Ceilings
• Post-commencement fliers?
• Puts a lid on
• Sign of shouting?
• Salary maximums
• Lens covers
• Toothpaste-tube closers
• Uppercase letters, briefly
• Major cities or large letters
• Upper-case letters
• Head-coverings
• Coverings for heads or bottles