Possible Clues:

• Sounds as if one and one is able to come to a big bill
• It sounds as if a brce of birds can bring in a big bill
• You've got to get out before you're able to get to the beak there
• Tropical bird with large bill
• Tropical American bird with immense beak
• For the Beak, a brace is able to sound like one
• By the sound of it, one brace able to have one beak?
• Sounds as if one brace is able to be only one bird
• Tropical large-billed bird
• A pair could be able for this bird, by the sound of it