Related Clues:

• Source of maple syrup
• Maple yield
• It runs up trees
• Syrup-to-be
• Not the brainiest sort
• Drain of energy
• Tree product
• Tree's blood
• Drain of strength
• It's appetizing to aphids
• Deplete, as energy
• It may be found in a trunk
• Deplete gradually
• Extra TV soundtrack
• Maple-syrup ingredient