His explanation was clear and easy to understand.
This photo is clearly captured.
His pronunciation is extremely clear.
He stated his opinion clearly.
It's necessary to make the purpose of the meeting clear.
The teacher gave a clear explanation.
はっきり is a casual, everyday adverb for clarity, while 明瞭 is a more formal word used in written or technical contexts.
clear and concise; succinct and clear
Rarely used kanji form.
Rarely used kanji form.