Related Clues:

• Drip source
• Hanging, of a sort
• It may hang from a cave roof
• Overhead projection?
• Cave 'icicle'
• Dependency established by drips
• Icicle-like accumulation of mineral deposits
• This column is dropped because many drips contribute to it
• Hanger-on left first part of play in tizzy
• Natural deposit, almost completely milky, seen in the country
• Play's opening at length in New York, say? It depends
• Performers take it when entering old bit of cave?
• Play with cast and a title, that's produced drippily in a cave
• Something hanging around front of cave - at least it might be
• A hanging for a caveman?