Possible Clues:

• Coming attraction, e.g.
• Tricky question: given time to relax, start to reply
• Facility in middle of district creating problem
• Problem: what's needed for meal without indulgence?
• Flirty type
• Tricky question presenting no difficulty in test paper, ultimately
• 'You may find this puzzle is, but little trouble once you get into it (6)'
• See 23-Down
• Promotional piece
• News opening, often