Clearness
Noun and な adjective
めいりょう
さすがベテランアナウンサーなだけあって、彼女はとてもよく聞き取れる明瞭な声でその質問に答えました。
As one would expect from a veteran announcer like her, she answered the question in an easy to understand, clear voice.
Something that is bright and clear has great clarity and clearness. Just look at something with such brightness and such clearness! It has so much clarity!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.