Related Clues:

• One fifth of an ABBA hit
• Solemn wedding words
• Rite answer?
• Caesar's 'vidi'
• Court oath
• 'If ___ say so myself'
• Altar affirmative
• Swearing-in pledge
• Start for a union?
• See 29-Across
• Common oath
• Words often exchanged
• Conclusion of a singles match?
• Promising reply
• Response to a minister