The phrase "a clear establishment" is correct and usable in written English.
It can be used when referring to a well-defined or unambiguous creation or formation of something, such as a rule, organization, or concept.
Example: "The committee's report provided a clear establishment of the new guidelines for the project."
Alternatives: "a definite establishment" or "a distinct establishment".
"Hunters" and "gatherers" made for a very clear establishment of separate roles for men and women, with few of any other options available.
This study presents for the first time an unequivocally and clear establishment of the reduction conditions of these eco-friendly approaches that should be selected to control the size and morphology of gold NPs prepared in view of their final application.
By Mr. Whitney's argument, the clear establishment of a personal right to gun ownership should open the door for advocates on both sides to discuss gun regulation; he offers a list of regulations that he would like to see enacted, including universal licensing of gun owners and registration of guns.
Having never been a crack-addicted thief, I can only guess that having smashed a car window, ripped out the stereo and legged it, one takes said plunder to a central clearing establishment (such as a drug dealer's flat) in the hope of exchanging it for a rock - that's street slang for crack cocaine, I think.
Even though their messages are clear, establishment Democrats and Republicans alike are at a loss as to how to deal with the winners in New Hampshire.
The characteristics they view as important relate to clear establishment and progress toward course objectives, creating an effective learning environment and the instructors' effective communication.
The Republican establishment is as fragmented as the rest of the American elite, and the Party's mandarins first spent a hundred and twenty million dollars backing Jeb Bush's Presidential bid, watched the despised Ted Cruz hire the cutting-edge voter-identification shops, and spread their endorsements around, so muddying the situation that there has been no clear "establishment" candidate at all.
There's no clear establishment that there was any communication using the trigger word.
