The collective noun crew can be used to refer to a group of people who are working together on a common goal, or to a group of people who are working together in a particular field or profession. For example, you could say that a crew of construction workers is working on a new building, or that a crew of scientists is working on a new project.
The collective noun crew can also be used to refer to a group of people who are working together in a particular place. For example, you could say that a crew of sailors is working on a ship, or that a crew of actors is working on a film.