Previous cryptic solution

Across: 1. Hotel 4. Serpent 8. Reprehensible 10. Extol

11. Ugly 12. Lame 16. Ideal 17. Round the clock

19. Leander 20. Dwelt

Down: 1. Horticultural 2. Top 3. Lieder 4. Sheets 5. Result

6. Embarrass 7. Theatre ticket 9. Calendula 13. Winded

14. Tether 15. Placed 18. Ore