Possible Clues:

• Thus the CA might bite so doggedly
• Highest digits in Sudoku
• Links halves
• The two of 1997
• At first a C.A. might need so many to make them like 25 down
• It's best to be dressed up to them
• Dressed up to display such figures
• Dressed to these is to be perfectly turned out
• A C.A. might have at least eighteen such teeth
• Numbers may be dressed up to them