しゅつらんのほまれ

しゅつらんのほまれ【出藍の誉れ】

●出藍の誉れがある be reputed as excelling [outshining, outdistancing, surpassing, eclipsing] one's master [teacher] 《at [in]…》.

●まさに出藍の誉れありというべきだ. This is an instance of a pupil outstripping the teacher.