Related Clues:

• Prefix with second
• See 27-Across
• Apple variety
• Metric prefix
• Billionth: Prefix
• Prefix meaning 'one-billionth'
• Apple product
• Second start?
• Prefix meaning ''minute''
• Second introduction?
• See 9-Across
• Second starter
• Prefix with bacteria
• A millionth of a milli-
• Prefix with technology