'a credible performance' is correct and usable in written English.
You can use it to express that someone has completed an action or task in an effective and competent manner. For example, "Brad gave a credible performance in the play and received a standing ovation from the audience."
Our gender identity is a product of a social performance: we perform for an audience, and they decide whether we have offered a credible performance by treating us in a manner that we assume is appropriate to that gender.
Only Carol Lambert, as the mother, gives a credible performance.
And, as every good actor knows, listening is the key to a credible performance.
Jason Crowl gives a credible performance as Florindo and Angela Madden is pert and sassy as Isabella, a maidservant.
If you want to have a credible performance of 'La Bohème,' you can't have a Mimì who doesn't look like Mimì," he said.
The British Olympic Association BOAA) has said that to earn a slot, a team must be capable of "a credible performance".
Moore turns in a surprisingly credible performance of "Help Me"; there's a callow but angelic optimism in the lead single, a version of John Hiatt's "Have a Little Faith in Me"; and her version of Todd Rundgren's "Can We Still Be Friends" manages to retain the chipper melancholy of the original.
Linney gives a thoroughly credible performance as single mother Sammy, holding down a white-collar job in a bank and looking after her son, Rudy.
Even if Lansbury's voice seems on a different level from that of her colleagues, it is a perfectly credible performance.
Overall, the President seems to be following your mosaic strategy — mobilizing the Hispanics, aiming at liberal urban professionals, mobilizing college students… At the same time trying to have a somewhat credible performance among groups that are less sympathetic.
Stephen Tyrone Williams, who faintly resembles a young Sidney Poitier, gives a thoughtful and credible performance as Cairo.
