Related Clues:

• Integrity shown in bed, perhaps
• Plant's breeding-ground in Scottish island
• What liars lack
• Render sharp pen, being straight
• Make pen sharper to achieve candour
• Plant; truthfulness
• Hard person going to pen truth
• The best policy covering home in remote Orkney isle
• Probity; plant
• Wren's accommodation on board sailing vessel has open feature
• Forthrightness
• Plant's home in one of the Orkneys
• Candour
• Sweetheart welcoming a good man's virtue
• To sharpen pen is an extremely good policy, it's said