Mono

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Across
  1. 3. System of government using ‘one’ ruler
  2. 4. A monochrome painting comprises different shades of only one color or is done in black and white.
  3. 5. A train which uses ‘one’ rail instead of two tracks
  4. 6. Control by ‘one’
Down
  1. 1. A single lens used to correct vision in one eye.
  2. 2. Of using ‘one’ tone only
  3. 4. Speech given by ‘one’ person