Possible Clues:

• No good looking, and that's flat
• Labour starts in suffering reaching climax, when candour is needed
• Not complicated
• Frank is in open country
• Not frilly
• Beginner in discomfort - that's obvious
• That's where the piano has been lying, and that's flat
• With nothing added
• Simple - flatland
• It's clear that here there are fifty in agony