Possible Clues:

• Tom, it may be, by custom identifying bird
• Time-outs travelling with one of the tweeters
• Bird finally caught rodent eating it
• Bird dressed to suit me
• It's not a rodent
• It's actually an 18-Down
• A bird's exciting times out
• Chickadee cousin
• Northern Cardinal likes to sing it back to tenor - the timid sort
• *Bird related to the chickadee