EtP Practice Cryptic, DTMA

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Across
  1. 3. Visiting player reportedly took a stab (5)
  2. 5. Trapped heroine encased in substantial iceberg (5)
  3. 6. Imprisoned heirs frightfully undo cells (9)
  4. 11. A benefactor, posessing energy, donates here (7)
  5. 13. 3.14, a number, and a tiny Roompaloompa prop (5)
  6. 16. Get out from Razorface's cape! (6)
  7. 17. Season 7's Christmas room: A mash-up with Batman? Yes! (5,5)
  8. 19. There's always something behind this strange odor! (4)
  9. 20. Tony Stein's son was over/about fifty-one (6)
Down
  1. 1. Solve this group of crows? (6)
  2. 2. A surface for the game made Pat able to play (8)
  3. 4. Escape this Podcast Host is buried, we hear (4,10)
  4. 7. Chronomaly crone confounds one ill army (4,1'5)
  5. 8. Doc Bill's "assistant" initially gathered rare, expensive gems (4)
  6. 9. Escape this Podcast Host is more sickly, we hear (4,6)
  7. 10. Installment Incident (7)
  8. 12. A small pair of Dr. Haledjian mysteries? (3-6)
  9. 14. A place for friendly discussion, or warfare (7)
  10. 15. Cult members are amiss, amiss (8)
  11. 18. The first villain's axle is broken (4)