Possible Clues:

• Kings escaping from select prison is easy undertaking
• Alfresco meal and walk in park
• Occasion for eating out?
• Select cut sounds perfect for outdoor dining
• Outing on which one takes food for eating in the open air
• Walk in the park to eat out
• Briefly go for and steal piece of cake
• Constant pessimist has no yen for alfresco dining
• Alfresco meal in breeze
• Lunch on the grass, e.g