The party 'leadership' is uncertain about what to do next. = ('Brit') The party 'leadership' are uncertain about what to do next.
The company has done very well 'under her leadership'. [=while she has been its leader]
What this country needs is the exercise of strong 'leadership'!
(..) Your powers will far exceed those of mortal men. It is forbidden for you to interfere with human history. Rather, let your leadership stir others to. In the next year, we shall examine the human heart. It is more fragile than your own. As we pass through the flaming turmoil (..)1978 Superman