Themed Puzzle - Body Parts

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Across
  1. 5. Initially, Sonia hears our upstanding leaders declare everyone's rights; between the arm, neck and back… (8)
  2. 8. Keen to unravel this leg joint (4)
  3. 9. Discovered in a grotto estate - little piggies? (4)
  4. 13. Footballers do this to a ball - your noggin! (4)
  5. 14. Peekers seen in key, essential documents (4)
Down
  1. 1. Bowel jiggles around for arm joint (5)
  2. 2. More than dreams containing a gripper (4)
  3. 3. Start with brilliant, amazing, cool kids! ...not the front! (4)
  4. 4. Body branch muddled ram (3)
  5. 5. Holding a book together is the centre of my back (5)
  6. 6. A long limb returned gel (3)
  7. 7. Two moving platforms from rotating fete! (4)
  8. 10. The bottom of my foot, I hear a spiritual essence (4)
  9. 11. Treasure's within front upper part of torso (5)
  10. 12. Stuff for brushing or combing within Earth, air, fire and water (4)