"The Game of Lives" cryptic crossword

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Across
  1. 3. Online connections (Abbrev.) (4,3)
  2. 6. Leading angel (7)
  3. 8. Companion hears buffalo surrounding Richard (6)
  4. 9. Title earned only if solve the mega puzzle (3,4,2,5)
  5. 10. Secret service spider (5,5)
  6. 11. Writer spreads harnessed jam (5,7)
  7. 13. Abel's evil brother (5)
  8. 15. The friend, a Jewish princess (5)
Down
  1. 1. Not state of Southern belle (5,7)
  2. 2. Three-in-one (7)
  3. 4. Bees at home? (3,4)
  4. 5. Belief in death (9,8)
  5. 7. Anonymous destruction (15)
  6. 12. Find matrix within. What a hassle. Epic battle (5)
  7. 14. Protagonist pastime (6)