queen bee

US /ˈkwiːn biː/
UK /ˈkwiːn biː/
"queen bee" picture
1.

the single fertile female in a colony of honeybees, responsible for laying all the eggs

:
The beekeeper carefully located the queen bee in the hive.
A healthy queen bee is essential for a thriving colony.
2.

a dominant or controlling woman, especially in a social group

:
She's the undisputed queen bee of the office, everyone follows her lead.
In high school, she was the queen bee of her clique.