Clear and lucid (especially of thought, memory, or expression); distinct and free from confusion.
彼は明晰な頭脳で複雑な問題を素早く解決した。
With his lucid mind, he quickly solved the complex problem.
明晰な説明が求められる場面では、具体例を出すと効果的だ。
In situations that require clear explanations, giving concrete examples is effective.