Possible Clues:

• Singing bird of Innisfree
• Get nothing back and catch it in the air.
• Songbird in Lent
• Yeats's song-bird
• Allow the little bird to be around the pub
• Brown-grey species of finch
• Might this fly up for 10 and 0?
• A singing bird as from Yeats's Innisfree
• Just allow the little bird to be around the bar
• Singing bird