Related Clues:

• A slight shift in Einstein's original negative figure
• One over the eight?
• Number of lepers who failed to return
• Cat's lives? - the next clue?
• It's dialled three times in an emergency
• Number of feline existences
• Short time for a wonder
• Span's inches
• Square number
• Store opening time, often
• Highest single digit
• The largest one-digit square
• Highest sudoku digit
• Upside-down six
• Number of 'lives' a cat has