leadingpost
nounUK /ˈliːdɪŋ pəʊst/
US /ˈliːdɪŋ poʊst/
The main or most important post in a group or system.
She was chosen for the leadingpost on the school newspaper team.
OTHER MEANINGS
2. The first post or marker that shows the way.
The leadingpost on the trail told hikers which path to take.
3. A post that guides or leads others in a race or march.
The runner in the leadingpost set a fast pace for the group.
4. The most important message or announcement in a series.
The leadingpost on the board shared the big news first.