"clear period" is not a correct part of a sentence in written English.
You could use the phrase "clearly," which means "in a way that is easy to understand," as part of a sentence. For example, "The instructions were presented clearly."
And some clear period markers are evident.
Again, drivers who experienced the steering ratio change displayed a clear period of adjustment, undershooting the steering wheel turning required to complete their lane change.
The paths in the stories roughly match paths on aerial surveys from the 1960s to the 2000s, indicating a clear period of use of more than 20 years.
Stephen's government job, luckily in this context, was about setting a framework rather than spending public money, but even so I have no doubt that there needs to be a clear period of time between him leaving government and taking up any UK media industry post and I would be equally sure it is what he would expect, and would abide by.
The remaining 59% were either unsure or flat out said no, they are not clear, period.
Of the many takeaways emerging from CES this year on the consumer hardware front, one of the clearest was that wireless earbuds are in a clear period of growth moving into next year.
The resulting bias amounts to a ∼15-K offset for midday atmospheric temperatures at subsolar latitudes during relatively clear periods and is negligible at night.
The summer vacation is when new lecture courses get written – because there are never enough clear periods during the rest of the year to permit the hours and hours of work required.
Clear periods overnight with a few showers.
Tonight, the cloud will break to give some clear periods.
Wednesday will remain dry with some lengthy clear periods.
