Related Clues:

• Augment, expand
• Increase, augmentation
• Make larger in a sincere way
• Grow or make larger
• Addition, growth
• Simple kind of arithmetic
• Grow, expand
• Calculation of the sum
• 'Increase, augmentation (8)'
• 'Augment, expand (8)'
• The combination of numbers to find the sum
• You might get in this too
• Just put it on - one more on the end
• More the sound of copies of the book
• What's more, a divine gets it with one on the end