Related Clues:

• Pieces of some pies
• Caffeinated nuts
• Trees with caffeine-rich nuts
• They’re nuts
• ESP can turn out to be nuts
• They can develop massively while eating cereal
• Squirrels' food
• Relatives of pistachios
• Sources for some vegan cheeses
• Nuts in a chipmunk's hoard
• They're squirreled away by squirrels