The phrase "a practice that can" is correct and usable in written English.
It can be used to introduce a discussion about a specific practice that has the potential to achieve a certain outcome or effect.
Example: "Meditation is a practice that can significantly reduce stress and improve mental clarity."
Alternatives: "a method that can" or "an approach that can".
Congressional hearings customarily begin with statements from members, a practice that can take hours.
Some include highly profitable DVD manufacturing or sales in their music divisions' financial results, a practice that can mask losses.
Typically, companies release only summaries of that information, a practice that can hamstring the ability of experts to examine it.
He found it unreasonable to "forbid in civil law a practice that can be considered a matter of private morality".
Sometimes that "flowback" water is re-injected into rock deep underground, a practice that can cause seismic disturbances, but often it is treated before being discharged into watercourses.
Shopping, likewise, is a practice that can only become compulsive in a modern society with disposable income or credit and an excess of consumer goods.
Traditional burial rites involve relatives touching the body – a practice that can spread Ebola – so the Liberian government has ruled that Ebola victims must be cremated.
To some, altering of images of the skyline to take the towers out is upsetting, a practice that can seem a kind of airbrushing of history.
However, some countries are buying land in wetter countries to grow their food, a practice that can jeopardize local food security, environmental justice and human rights.
The best way to do that, they say, is to train and systematically deploy their workers — a practice that can be accomplished only with actual employees.
According to other research, the average person over 65 takes at least four prescription drugs — a practice that can lead to dangerous and unexpected interactions.
