Related Clues:

• Green, in a sense
• Friendly beginning?
• System starter?
• Eternity
• Exceedingly, with 'so'
• Endlessly
• In perpetuity
• It's before after
• 'If I ___ ...'
• "The Island of the Day Before" author
• Lasting starter?
• It's often before after
• Word with more and lasting
• "Baudolino" novelist
• See 43-Down