Related Clues:

• Hit the canvas
• Dog-paddle, say
• Go with the flow?
• Sidestroke, e.g.
• Thick of things
• Respond to a haymaker
• Go through channels?
• React to a sidewinder
• Do laps, perhaps
• What a bop on the head might cause you to do
• React to a haymaker
• Be woozy in the ring
• Do the butterfly
• One way to travel by sea
• Stroke, stroke, stroke...