Related Clues:

• Good throw produced more
• Applauds at regular intervals? That's a positive sign
• A sign of increasing significance
• In addition (to)
• Increment - accumulation
• Tumour - enlargement
• Increase - development - tumour
• Development - enlargement
• The opposite of minus
• Strengthening
• "But wait, there's more!"
• Grade qualifier
• Positive — addition
• Accumulation has an unkind sound
• Make progress with most of article in development