Related Clues:

• Binding oath
• It's taken by Nicholson in ''A Few Good Men''
• Life-altering words
• Boy Scouts take one
• Attestation
• Some offices require it
• Curse word
• Ringing endorsement?
• Berlin's 'What'll ?'
• Ceremonial vow
• Swearing-in affirmation
• Rats, e.g
• Words from 4-Down
• Words that have a ring to them?
• Vow; expletive