The phrase "a separate issue in" is correct and usable in written English.
It can be used when discussing a topic that is distinct from the main subject being addressed, often to highlight a different concern or consideration.
Example: "While the budget is a significant concern, the environmental impact is a separate issue in our planning process."
Alternatives: "a different matter in" or "an unrelated topic in".
The brief then went on to alert the justices to a separate issue in the case, about the scope of an exception to the government's sovereign immunity.
Shark feeding is a contentious topic in Playa del Carmen, and a separate issue in its own right.
Acting on a separate issue in the same case, however, the appellate panel reversed a $15-million 15-milliongainst Hyundai and sent the case back to Los Angeles Superior Court for a new trial.
One can think and Dawkins does that organisms have adaptations without thinking that organisms are the "ultimate beneficiaries" of the selection process.[5] This sense of "beneficiary" that concerns adaptations will be treated as a separate issue, discussed in the next section.
A separate issue is whether in a certain clinical situation, with the full knowledge that a patient is G6PD-deficient, one may administer rasburicase nevertheless, having deliberated that allopurinol is not a valid alternative, and having weighed that the life of the patient is more at risk from TLS than from AHA and methaemoglobinaemia, which will develop and will be appropriately managed.
GCHQ's work was not officially admitted until the Geoffrey Prime spy scandal and a union ban - an entirely separate issue - in the Thatcher years.
Sullivan's death is a separate issue, and lumping it in with other mistakes at Notre Dame is to trivialize it.
A separate issue of justice arose in columns about the Broad Channel Three: two firefighters and a police officer from Queens who were fired by the Giuliani administration in 1998 after they rode, while off duty, on a racist parade float.
It's a separate issue, but it's in the same zone.
In a separate issue, Mr. Edwards is scheduled to stand trial in October on charges that he accepted illegal campaign contributions to hide an affair during the 2008 campaign and filed false campaign reports to cover up the payments.
In a second study, published in a separate issue of the Journal of Gerontology, Thorpe led a team of researchers who examined the relationship between race and mobility to evaluate how socioeconomic status indicators, such as education and poverty level, affect this relationship.
