Previous quick solution

Across: 7. Seventh heaven 8. Old-timer 9. Gasp 10. Contra

12. Indict 14. Sin 15. Doubts 17. Ground 19. Arms

21. Mountain 23. Unadulterated

Down: 1. Well-to-do 2. Sextet 3. Atom 4. Charting

5. Ragged 6. Gems 11. Assembly 13. Confined 16. Beside

18. Outlay 20. Rang 22. Used