What is A large, complex secondary group that has been established to achieve specific goals?

Answer: Formal organization

Explanation:

A formal organization is known to be an organization with a well-defined set of goals, objectives and rules. Thus, in this type of organization, work is assigned to each of the workers in order to achieve these set of goals. Hence, communication is effective and done through a chain of command.

Formal Orginization is a large, complex secondary group that has been established to achieve specific goals.