The phrase "a mainstream piece of" is correct and usable in written English.
It can be used to describe something that is widely accepted or popular within a particular culture or society.
Example: "The film was a mainstream piece of entertainment that appealed to a broad audience."
Alternatives: "a popular example of" or "a widely recognized form of".
With Nathan Lane as the president, "November" is atypical Mamet, extremely funny yet relatively acid-free, a hit and a mainstream piece of commercial fluff.
The Hydrogen One is, by all accounts, about as far as you can get from a mainstream piece of mobile hardware.
It's the first of Swedish-born director Daniel Espinosa's films to get a festival premiere and he appreciates the chance to put a mainstream piece of genre filmmaking in front of audiences at a place like SXSW.
Never has there been such a prescient piece of mainstream entertainment.
Though there are considerable efforts made by the organizations in disaster intervention to engage women for disaster risk reduction, the strength of women is not seen as a piece of mainstream strategies where women leading disaster programing is a need.
Noted quibbles aside, Mission: Impossible -- Ghost Protocol is a splendidly exciting piece of mainstream entertainment.
One of the first mainstream pieces about AIDS, the film featured Springsteen's phenomenal ballad "Streets of Philadelphia," which added so much to the images of illness, hope, and death (and won the 1993 Academy Award for Best Original Song).
Bell also acknowledges that her definition of marriage is far from mainstream, transcending beyond just a "piece of paper".
Campaigning against the mainstream media while wearing a piece of pop culture iconography that's licensed to Time Warner shows just how ill thought-out the whole thing can be.
Campaigning against the mainstream media while wearing a piece of pop culture iconography that's licensed to Time Warner shows just how poorly thought out the movement's actions can be, as does the fact that nobody seems to know exactly what they want out of these protests.
