Possible Clues:

• A trait's what's making one so narrow
• Narrow way
• It follows the star in a narrow sense
• & 29 Med waterway with which fantasist is more concerned?
• Arts programme on Italian channel
• Is this a characteristic of the South, in the narrow sense? (6)
• Funnel for ships
• A channel without water, reportedly
• The Bosporus, e.g.
• Items of food served up -- one's dropped in passage