Related Clues:

• Origami output, sometimes
• Whooper, e.g.
• Aquatic bird
• Kind of song or dive
• Trumpeter, e.g.
• Trumpeter, for one
• Bird in a bevy
• Graceful dabbler
• Long-necked swimmer
• Cygnet
• Pen with eggs
• Park swimmer
• Ugly duckling, eventually
• Ugly Duckling, in reality
• Exemplar of grace