Possible Clues:

• Look! First signs of bee orchid in belvedere
• Kind of summerhouse with wide view
• Stare intently at the boy, missing the last place to sit in the garden
• Look with bishop round summerhouse
• Site of many an outdoor wedding
• Start to stare at what's been put up in the garden
• Shelter that's often octagonal
• Start to be your lookout in the garden
• The look and smell of a summer house?
• Fixed look by old boy recalled in pavilion