Related Clues:

• Feature of many a sympathy card
• Limerick, for one
• Metrical verse
• Hallmark card text, often
• 59-Across, for one
• Pope piece
• Greeting card feature, often
• It has been compared to a tree
• Stressful work?
• Rhyming literature
• Verses
• Body of verse
• Frost work
• Whitman output
• It's measured by the meter