1-1-1 doubling rule

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Across
  1. 2. fit+ness=
  2. 5. let+ing=
  3. 6. clap+ing=
  4. 7. ban+er=
  5. 9. rob+er=
Down
  1. 1. hid+en=
  2. 2. fret+ful=
  3. 3. span+ing=
  4. 4. snap+ing=
  5. 8. run+er=