стать настоящим

become a real or true

→ стать
phrase Rare #36,887
become a real or true The adjective changes its ending to agree with the person or thing being described: настоящим, настоящей, настоящим, or настоящими. The following noun is usually in the instrumental case.
RU: Я хочу стать настоящим профессионалом.
EN: I want to become a real professional.

Трудно стать настоящим пианистом.

It's hard to become a real pianist.

— Виктория (2015)