Related Clues:

• Erno's geometric shape
• Take to a higher power?
• Third power
• Sugar serving
• Crouton, essentially
• Die, for example
• 64, e.g.
• Sugar ____
• See 23 Across
• Raise to the third power
• Rubik invention
• Important energy source for the brain
• Rubik's brainteaser
• Die, for one
• Rubik's invention