Possible Clues:

• Made 3 into 27
• Copper on border, cut up?
• To the power of three
• Like some sugar? One is so unchanging
• Lifted by the third power cut
• (Of number) multiplied by its own square
• Raised to a higher power, like sugar used to be
• More than doubled
• Turned 10 into 1,000
• Made 7 into 343, say