The phrase "a clear and important" is correct and usable in written English.
You can use it to describe something that is both easily understood and significant in context.
Example: "The report provided a clear and important analysis of the current market trends."
Alternatives: "a distinct and significant" or "an evident and crucial".
This a clear and important battle line in the United States.
Ms. Bouder made every birdlike detail and each phrase a clear and important part of a flowing whole.
"Silent Spring outlined a clear and important message: that everything in nature is related to everything else.
"Freezing our current level of funding is a clear and important sign of support from the government and we welcome this very much.
Said Joshua Steiner, a former chief of staff in the Treasury Department under Bill Clinton and a vice chairman of the board of trustees at the library, "If you look at Tony's experience in a complex environment pushing through meaningful change, that to my mind was a clear and important indicator of his willingness to think deeply about issues and to believe strongly in the importance of change".
Metaphysical realists think that anti-realists are refusing to acknowledge a clear and important distinction.
She corrects important topological misconceptions (unfortunately common in the parasitology/infectious disease fields), acknowledges other authors with similar ideas, and overall makes a crystal clear and important contribution to our understanding of one of the most fascinating problems in protein transport to emerge in recent years.
There, "influential information" is defined to be that scientific, financial, or statistical information, which will have or does have a clear and substantial impact on important public policies or important private sector decisions.
A methodology specifically suited to the area of nutrition is lacking, despite a clear need and important requirement from policymakers as well as a direct interest for consumers.
Further, it applies to web posts involving "scientific information... (with) a clear and substantial impact on important public policies or private sector decisions".
("Influential" information is that which an agency "reasonably can determine will have or does have a clear and substantial impact on important public policies or private sector decisions").
