Good Times in the Casino

Craps Man thinks that an additional shuffle makes the game more interesting.

Across
  • 1. "Saturday Night Live" creator's art/sex mash-up (6)
  • 4. Takes back free mail alternatives (4)
  • 6. Riddle epiphany: short stretches of time constitute a period lasting 54 million years (8)
  • 13. Congolese language is polite (7)
  • 14. Lazulite-hued waters filling cube (7)
  • 15. One way to extend a list on purpose (5)
  • 16. Impressionist drawing in gallery's top ten percent (5)
  • 17. "Stomach bug," he claims, peculiarly (8)
  • 20. Fringe elements of seminar expelled, returning in a low grade; I go too (6)
  • 22. Walk-ons audition for average commercials (7)
  • 25. Station that knows: drama is crap (5)
  • 26. Not for the first time, photograph family: middle age (7)
  • 27. Rear port (6)
  • 28. Barrow dweller's poor relation (8)
  • 29. Noisily root for determined resistance effort (5)
  • 32. Reach further by conserving power, first turning upside down (5)
  • 33. Nailed enormous bird, left result without reservations? (7)
  • 36. Had a child, possibly dependent (7)
  • 38. Out-of-control Greek women queue left and right before Helen's launch (4, 4)
  • 39. Asparagus: maybe an illegal substance, informally (4)
  • 40. Selecting attractive object (6)
Down
  • 1. Error—use acid on a metal? Hydrogen escapes (3)
  • 2. Illness cards, that have prognostic value (5)
  • 3. No end to committee; heads of arts and sciences like so many low-budget entertainments (5)
  • 4. Having flip-flopped, authoritarian lost Massachusetts in exchange for Madoff's final cry of pain: "Communist" (3)
  • 5. Element 13.1 (a), two hairpins linked together twice (3)
  • 7. Name novel "The First Junkie" (4)
  • 8. "Getting It," an article essential to calm an actor (7)
  • 9. Not do well, back in 1996: musical soundtrack was a hit; I lost inventory initially (7)
  • 10. "Missing for College," a movie about Rio slums (4, 2, 3)
  • 11. Imaginary counterpart in terrible mishap (7)
  • 12. Of the East L.A. turf leader, following very loudly with everyone (4, 4)
  • 16. Beheading lacks axes (9)
  • 18. Tossed grenade at parting Socialist dictator (8)
  • 19. Clamping tool coming after head of Han Solo (5)
  • 21. Important, holy Rip Torn (1, 6)
  • 23. In road rage; terminally angry (7)
  • 24. Tea-Party-supporting billionaire brother heard odd, odd tape (7)
  • 29. In the opera, he sings a female part in rehearsal, salaciously (5)
  • 30. Entertaining dip partway up Niagara (5)
  • 31. Run into major difficulties with picnic invaders (4)
  • 34. Sure shot cutting a bear in half (3)
  • 35. A yell that frightens, a noisy cry of fear (3)
  • 37. Tide levels may be predicted by this one, missing from wash (3)