establish as

establish (oneself, someone, or something) as (something)

To confirm oneself, someone, or something's role or reputation as being a certain thing or having a certain status. That merger established the company as the biggest on the East Coast. I think you need to establish yourself as a tough teacher early on so that the kids actually listen to you.
See also: establish

establish someone or something as someone or something

to validate or confirm someone or something as someone or something. As soon as we establish her as a viable candidate, we will launch the publicity campaign. She established herself as an authority on rare books.
See also: establish
References in classic literature ?
Though the company, by treaty, have a right to a participation only, in the trade of these regions, and are, in fact, but tenants on sufferance; yet have they quietly availed themselves of the original oversight, and subsequent supineness of the American government, to establish a monopoly of the trade of the river and its dependencies; and are adroitly proceeding to fortify themselves in their usurpation, by securing all the strong points of the country.
1264a] would establish a government upon a community of goods, ought to know that he should consult the experience of many years, which would plainly enough inform him whether such a scheme is useful; for almost all things have already been found out, but some have been neglected, and others which have been known have not been put in practice.