The shape of a story
Angle
Also: news angle
The specific way into a story: the particular point of view or emphasis that makes a broad subject into one publishable piece.
Ten reporters at the same event come back with ten angles. The angle is your decision about what the story is really about. A council budget can be an angle about rates, about a new pool, or about the councillor who walked out. Pick the sharpest one your facts can support, then write to it.