Possible Clues:

• Not the wide ocean for the star it following
• Not abroad by water?
• Rigorous shake-up of 12
• Narrow channel of the sea joining two larger bodies of water
• By the sound of this, there's many a one like this for the Irish Mail to get over
• The saint practises 17 down with it, but not in any broad sense
• Painting's up over it, but not broadly speaking
• Is is a characteristic of the South to be so narrow?
• Is it a characteristic of the South to be narrow?
• Narrow watery stretch