The phrase "a clear border" is correct and usable in written English.
It can be used when describing a distinct or well-defined boundary between two areas, whether in a physical, graphical, or metaphorical context.
Example: "The map features a clear border between the two countries, making it easy to identify where one ends and the other begins."
Alternatives: "a distinct boundary" or "a defined edge."
Who can draw a clear border between Tremont and Fordham in the Bronx?
3 Spread the hazelnut butter over the pastry, leaving a clear border of a couple of centimetres at the edge.
Thus Mr. Brooks has painted a clear border through a complex landscape and then concluded that Mr. Obama is wishy-washy because he has footprints on both sides.
Note that he doesn't mention a clear border in the area between "Candahar" and Peshawar, now in Afghanistan and Pakistan respectively — still a problem.
In the sham rats, the microgram indicated a normal structure; specifically, a clear border of the trabecular bone was identified, which was filled with bone marrow cells.
If there ever was a clear border between hip-hop and activist poetry, Saul Williams crashes through it on his album "The Inevitable Rise and Liberation of Niggy Tardust" (niggytardust.com).
Twenty minutes after takeoff, Schutte brought the aircraft into a clearing bordered by a stand of pine about 40 yards from a meandering shallow creek populated by six-inch rainbow trout--a good food source for raccoons.
It also has a very clear border, exceptionally low variability, and can be performed by a single surgeon on up to 30 animals a day.
From the data, a very clear border exists between the highest intra-varietal variability (including here the sports) with 1 different allele and the lowest inter-varietal distance of 9 different alleles.
The growth pattern of angiosarcoma is usually infiltrative, without the formation of a capsule or clear border distinguishing the tumor from normal tissue.
Well, does the term hogwash mean anything to you? Prime Minister Ehud Barak's courageous decision to unilaterally withdraw Israeli forces from Lebanon has, for the first time in 22 years, restored a clear-cut border between Lebanon and Israel, and that will only leave Israel with a tighter fist and a more unified public, ready to protect what is really important.
