Possible Clues:

• South-eastern area with channel showing 'Coast'
• Unpredictable disease from On the Waterfront
• Disease in circulation on the Banna Strand
• Coastal region, or what each starred answer has?
• Disease spreading in popular resort area?
• What's found on the coast, apart from Kent etc
• Main team in coastal area
• Covers of sublime track in Beach Boys' territory
• Littoral
• Disease spread about where many take their holidays