Related Clues:

• Secret sexual relationship
• Social event or sexual relationship
• Romantic relationship between two unmarried people
• Romantic relationship, perhaps illicit
• A festive occasion, perhaps of sporting nature
• The sort of entertainment that would make one lively beforetea
• What's the matter with being 17 down in the end?
• 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
• Not, by the sound of it, a dark sort of business
• A liaison with a blonde at last!
• You'd love to have a tune that's so fortissimo
• Lively enough for the start of 35 across to bring it to life
• Sounds like a market sort of business with a very loud tune
• In the matter of a market, by the sound of it