The phrase "a clear mark" is correct and usable in written English.
It can be used to describe a distinct or easily identifiable indication or sign of something.
Example: "The teacher left a clear mark on the paper to indicate where the student needed to improve."
Alternatives: "a distinct sign" or "an obvious indication".
"This has left a clear mark on the Bundesbank's balance sheet".
It is a clear mark of our Scandinavian culture and one that has little recognition (or at least I thought) in the United States.
From two different angles, Hot Spot showed a clear mark on the top edge of the bat but Llong ("there is a mark, Ravi") remained unconvinced that it might not have come from an outside agency.
Owens said he had not seen anything but told the captains, England's Chris Robshaw and Rory Best: "I have an accusation of biting, a clear mark on the finger.
The two Android smartphones are the first to carry Google's branding without being associated with another manufacturer and are a clear mark in the sand by the Android-maker: the fight with Apple is now on for the top premium smartphone.
At the next pause in play the flanker speaks to Nigel Owens, the referee, who immediately stops the game clock, calls the captains, Chris Robshaw and Rory Best, over and tells them: "I have an accusation of biting, a clear mark on the finger.
Exam boards are now allowed to change a mark only if there has been a clear marking error.
In other words, the grade will only change if there is a clear marking error rather than a difference of interpretation.
With a clear marking key, success criteria and purpose in mind, children set about assessing either their own, or a partner's piece of writing.
From this summer, however, examiners are being told to only change a mark if there is a clear marking error rather than simply a difference of interpretation, which is likely to result in substantially fewer successful challenges.
While engrafted hCNS-SCns migrated extensively away from the injury epicenter, our tissue collection techniques for this experiment did not include a clear marking of the rostral/caudal ends of the spinal cord, and thus, we were unable to assess direction-specific migration of hCNS-SCns (i.e. number of cells present in the rostral vs. caudal segment of the spinal cord).
