Something for a rainy day

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Across
  1. 5. (S)he's behind you!
  2. 8. Grass-cutters' workplace
  3. 9. Take your partners here
  4. 10. Bird's hideout
  5. 12. Ladies back!
  6. 13. Danger - move closer!
  7. 14. Tetchy outburst from frustrated solver
  8. 17. Shall we start here with a drink?
  9. 18. Mother hill - shivery!
Down
  1. 1. Rag ties (anag) for the complete rambler
  2. 2. Have a gander at this top!
  3. 3. (S)he who must be obeyed
  4. 4. Rescue Save our hills!
  5. 6. A trio of minions show the way
  6. 7. Big Bramley gets in the way
  7. 11. No shade here....
  8. 14. Do we hear a cutter at work here?
  9. 15. Some sea tang here?
  10. 16. ...and plenty here