Related Clues:

• Undulation
• Give the ___ (pick)
• Stadium motion
• Indicate agreement with
• Bleacherites' choreography
• What a surfer rides
• Breaker
• Acknowledge the crowd
• Surfboard support
• Surfer's surface
• Onslaught
• Whitecap, e.g.
• Greet, in a way
• Whitecap
• Gestured greeting