Tongue-tied Toad & Fluent Fly

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Across
  1. 1. To rotate into a coil
  2. 3. Feeling isolated and friendless
  3. 5. Practical session to improve on something
  4. 8. A variety of fly
  5. 9. A means to pass information from one to another
  6. 12. A speech impediment
  7. 13. A natural wetland
  8. 15. A life lesson
  9. 16. An earnest request
Down
  1. 1. The most flexible muscle
  2. 2. Positive feeling
  3. 4. A piece of land seperate from the mainland
  4. 6. An intangible aparition
  5. 7. Having ease and control over language
  6. 10. An amphibious species
  7. 11. Small beast
  8. 12. Person designated to speak
  9. 13. A feeling of failure
  10. 14. Solemn promise