Possible Clues:

• Sum-thing special in arithmetic
• Numerical two-dimensional matrix where the sum of all the rows (vertical, horizontal and diagonal) is the same
• Apt address for an Orlando team?
• Ancient talisman with mathematical properties
• Famous travellers (about 100 possibly) in mathematical array
• Recreational mathematics construct
• Its rows, columns and diagonals all add up to the same number
• Whichever way you look at it, it adds up to the same thing
• Fantastic - out of debt! The sum's the same, however you look at it