The phrase "a separate aspect" is correct and usable in written English.
It can be used when discussing different components or features of a topic that are distinct from one another.
Example: "In our analysis, we will examine a separate aspect of the issue that has not been addressed previously."
Alternatives: "an independent facet" or "a distinct element".
Alex leads a team, and another team often works elsewhere on a separate aspect of the same mission.
It consists of four hotel room episodes, two visits each to different marriages, each pair a showcase of a separate aspect of the playwright's comic predilections.
Neoforma's earlier accounting difficulties stemmed from the methods it used to account for a separate aspect of its relationship with Novation.
He repeats the process on successive plastic sheets, each one focussed on a separate aspect of the composition, including the rock's contours.
But jurors apparently believed that he failed to cause any pain or injury with the blow, a separate aspect of the charge.
(The whole might have been aptly titled "Suite Suite".) The episodes are cleverly paired, two visits each to separate marriages, each pair a showcase of a separate aspect of the playwright's comic predilections; in sum, Neil Simon 101.
However, our findings are limited to the extent that we cannot attribute them to any separate aspect of the program.
Exhibition has typically been a distinctly separate aspect of the film itself whereas a film is already completed by the time it is shown anywhere.
A separate worrying aspect of the bureau's report did not make the headlines.
Does Dvl2 participate in the same Dact1/Sestd1 complex or in some separate aspect of Vangl2 cell biology?
Both and more; Balanchine's scene is a collage of fragments, showing not a narrative progression but separate aspects of the relationship in which the two are locked.
