Possible Clues:

• Every other way to make this ante, just for a change
• Every other bird came in with wings
• Every other change to what the North swallowed
• Flip! Its letters are lent!
• Switch C and B in box?
• Every other way the bird was fed at last
• Take turns to change? Neat twist
• How to make neat see-saw or yo-yo?
• Take turns and vary number consumed
• American substitute porter, perhaps welcoming group of three visiting