Related Clues:

• Decreases gradually
• Gets smelly, say
• Marine retreats?
• Tides favored for boating departures
• Turns, in a sense
• Becomes inedible, in a way
• Recessions
• One leaving mob scenes goes bad
• Flows away
• Runs out of water
• Becomes bad
• Flows back — declines
• Recedes to the ocean
• Goes rancid
• Draws back, as water from a beach