Possible Clues:

• The saint has a single talk with his bird
• One chirping adds some weight to conversation
• Heathland bird
• Is the saint flying over for a single talk?
• Scone that was demolished by a bird
• Pelt French cat for catching a bird
• Variety of acts on the 1 down
• Small heathland bird
• Heathland songbird
• The cantos composed by a songster