6. Aluminum foil (7)
7. German submarine (5)
9. Fragrance (4)
10. Orgy (10)
11. An elementary particle with negative charge (8)
13. Boundary between 2 nations (6)
15. Meal in a shell (4)
17. Arcade coin (5)
18. A type of edible bean (4)
19. Invented the lightbulb (6)
20. A persistent false psychotic belief (8)
23. Unquestionably (10)
26. Winged (4)
27. Artist's workstand (5)
28. Salacious (7)
Down
1. Lacking social graces (10)
2. Anagram of "Resold" (6)
3. Smooth-tongued (4)
4. Neither urban nor rural (8)
5. Kid (4)
6. Like some currents (5)
8. In a concise manner (7)
12. Nude (5)
14. Opposition (10)
16. A moderately slow tempo (7)
17. Touchable (8)
21. Provide a detailed plan or design (6)
22. Female internal reproductive organ (5)
24. Consequence (4)
25. Drill (4)