My first attempt at a Cryptic Crossword

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Across
  1. 2. Minute and second stolen by heartless inquiry (4)
  2. 4. Looking back, Fool Us replaced you with at first Alyson Hannigan and then fruits? (7)
  3. 5. The art she keeps in a suit (6)
  4. 7. Beloved animal sounds (4)
  5. 8. Jumbled word left in margin next to an article in 'The Mirror' (7)
  6. 10. I hear discovery was charged (5)
  7. 11. Dig for some sort of oat in cave around cross (10)
  8. 14. In the sea teddybears sat down (6)
  9. 15. An oddly mean glitch? It's impossible! (5)
  10. 17. Some tales of termites are less hard (6)
Down
  1. 1. Weirdly tuned in after dance club stopped (12)
  2. 3. Prawn shortly returning to operate sci-fi engine type (4,5)
  3. 6. We returned flower to dangerous creature (8)
  4. 9. Herb remained unused? (4)
  5. 12. Fruits and vegetables at last left without applications? (6)
  6. 13. Start sobbing after giving away a lot of clothes and an old game (5)
  7. 16. A card expert (3)
  8. 18. Utensil tactic (4)