Related Clues:

• Not the brainiest sort
• Recede to the sea
• Drain of energy
• Extract by percolation
• Tree product
• Tree's blood
• Drain of strength
• Fade
• Motion of the ocean
• Move back
• It's appetizing to aphids
• Go out to sea
• ''... Rich and Famous'' host
• Deplete, as energy
• Become less intense