Usage patterns
清楚な〈人〉a neat, modestly elegant person
She is always said to be a neat, demure woman.
清楚な〈物〉simple, modestly elegant (clothing, appearance, etc.)
White blouses are popular as neat, elegant clothing.
清楚な印象を与えるto give an impression of neat, modest elegance
That makeup gives an impression of neat, modest elegance.