In Focus Meaning

(idiomatic, of one's thoughts) Clearly perceived.

Example: 2013 July-August, Catherine Clabby, “Focus on Everything”, American Scientist:
  Not long ago, it was difficult to produce photographs of tiny creatures with every part in focus. That’s because the lenses that are excellent at magnifying tiny subjects produce a narrow depth of field.
  As he spoke the plan became in focus.‎