Related Clues:

• Runs
• See 23-Down
• Circulates
• Proceeds smoothly
• Developments
• Courses
• Ebb and neap, e.g.
• Neap and ebb
• What the fashion-savvy watch for
• Surges
• Faddists' concerns
• Runs smoothly
• Futurists' focus
• Potential sandcastle destroyers
• High and low, e.g.