Related Clues:

• Tree bark from the South?
• Tree bark from the South of Ireland?
• Bottle-stopper for a southern city
• One might have a priest in store to plug for this
• Madame Butterfly-by-night? Not light enough
• You've got to go South to get it in the neck with a bottle
• Not floating in Ireland
• Neck cover
• Buoyant substance from a tree
• Largest Irish county
• It's on top of the wine or port
• Irish city
• Defender who may get it in the neck
• US barque coming into port
• Port removed from bottle?