Related Clues:

• Pricey event
• Many an opening event
• Dressy do
• Summer shindig, and a hint to the starts of 17-, 24-, 41- and 51-Across
• Extravagant affair
• Benefit event
• Star-studded fete
• Summer social event
• A festive occasion, perhaps of sporting nature
• The sort of entertainment that would make one lively beforetea
• 17 across would be enough to make this lively occasion come to life
• If you get tea at this festive occasion, it will put some life into you
• Lively enough for the start of 35 across to bring it to life
• Given some tea she would make this occasion quite lively
• To have tea at the end of the celebration would have made one quite lively