Triple /s/ and /r/ blends

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Across
  1. 2. a device that sprays on the grass
  2. 3. to wrote quickly and messily
  3. 5. careful planning
  4. 7. someone you don't know
Down
  1. 1. the way something is built or organized
  2. 3. spreading out over a large area
  3. 4. to make something no longer bent
  4. 6. began to grow from a seed