Meaning 1 ►▼
The inside of a track is shorter than the outside; it is easier to win if one is on the inside of a track.
The horse started on the inside track.
Meaning 2 ►▼
to have information or a position which will make it easier to win
He will be able to talk to the head of Disney first, because he has the inside track. He worked with Disney on a previous project.