Possible Clues:

• It's not so plain that the big bird gets round the company in style
• Ornate legendary bird circles round about
• Style with ornament or otherwise with 2 2s?
• Plain's opposite
• Late baroque style (of furniture or architecture)
• Florid Milne character has caged bird lacking tail
• Ornate style of decoration.
• Bird almost fitting into small jumper, showing lots of curves?
• Opulent architectural style
• Fancy breaking ducks with a couple of centuries, one's first runs