ACROSS
1. Exposure to the action of air (8) 5. Enclosed plantations of fruit or nut trees (8) 10. Areas of comparatively great elevation (7) 12. Work done for a customer, especially in maintenance of equipment (7) 13. Stretch of land (5) 14. Delicate (7) 15. Having 16. _latte is a soft Italian blue-veined cheese (5) 19. Decayed (6) 22. One to whom a lease is granted (6) 24. Consequence (7) 25. Material made up of tiny rounded grains of rock, especially quartz (4) 26. Desert-dry (4) 28. Legally expelled from a building (7) 30. Fruit of the tree (6) 33. Extremely bad smell (6) 36. Large English draught horse breed (5) 39. Give up (a project or course of action) (7) 40. Tropical tree whose fruit pulp yields an orange dye used as a food colouring (7) 41. More advanced in years (5) 42. Butcher's chopper (7) 43. Teaching; instruction (7) 44. Type of truck with hinged side panels (8) 45. Volatile gas from which a green fuel can be produced (8)