What is a SISTER

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Across
  1. 3. favourite times
  2. 5. enjoying each other
  3. 10. favourite of Kiff
  4. 11. beautiful russian blue
  5. 12. relies on you for his sanity
  6. 13. place to find Norbert
Down
  1. 1. favourite sister
  2. 2. coming to call
  3. 4. close bond
  4. 6. nice to chat
  5. 7. there's no place like it
  6. 8. Ruth's sister
  7. 9. delicious fruity spread