Last week’s solution

()=included, []=excluded

Across: 1. half-mast 5. [N]ice-cap 9. neatherd 10. endrin 12. French Polish

15. Ro(a)ds 16. B(er)noulli 18. Americana 19. eagre 20. foot (a)nd mout-h

24. Uni-v-ac 25. T(ova)rish 26. tanner

27. h(y)pnosis

Down: 1. hind 2. Lean 3. Ma-hari-shi 4. spring(board)s 6. c(ong) o 7. c-ardiology 8. Punch lines 11. pharma-colog-y 13. bread-fruit 14. Mace-don-ian 17. overt-rain 21. a gate 22. pips 23. th[o]us[and]