Alex and Lorenza's cryptic crossword

12345678910111213141516171819
Across
  1. 3. Boy lost in red barn
  2. 5. Law hidden in femur physics
  3. 8. Our sand is strangely reptile
  4. 9. Constant gratitude at first animal
  5. 10. Currently mostly behind on an article about student love for a show
  6. 13. Mathematician joins in circumference disgust
  7. 15. Animal seen in robot terminal
  8. 16. 500 of the French come after copper pennies to hold
  9. 17. Hard year in power unit for scientist
  10. 18. Place drugs around a band for food
Down
  1. 1. This Latin pitch for sport
  2. 2. Most delight after counter weapons embraced
  3. 4. Avoid animal
  4. 6. Traitors see garden destroyed
  5. 7. King annoys food man
  6. 11. Back the French man
  7. 12. Myths bearing variable acceleration for a girl
  8. 14. A mammal is a bird without a castle
  9. 15. Place a car on a cow
  10. 16. Confused panic at leader
  11. 19. An animal is regularly ignorant