ACROSS
1. Compulsive collector
6. Severity
11. Nautical command (5,2)
15. Aunt and …
16. Not in my back yard
17. Skies
18. Rural residence
21. Dowdier
22. Gnarled
23. Street march
24. Affliction
28. Twelve months
30. Security lapse
32. Length units
35. More competent
37. Landscape
38. Sharp twinges
40. Leisure activity
43. Spryly
45. Stall
47. Royal racecourse
48. Guide dogs