Replace with value from another observation?

Hi Statalist!

I am so please to be on board this great list that I have often used with great please. Now I have a question of my own:

I have data that looks like this:

ID	ID_of_Leader	Employee_score	Mean_employees
1	.	.	.
2	1	0.2	0.4
3	1	0.4	0.4
4	1	0.6	0.4
5	6	0.5	0.5
6	.	.	.
…

I have calculated the mean of the employees using egen with bysort, but now I want to create a new variable that capures the mean of the employees on the relevant leader and I can’t figure out how to do this. Can anyone help me?

Best regards
Aske