Why would you require this? Concepts can either be a part meaningfully differentiated from the whole (neocortex, hypothalamus -> the whole brain) or an aggregate that while reducible to more basic parts is meaningfully differentiated from other similarly reduced aggregates (neocortex vs. hypothalamus). What seems to define the demand for the "real" or "irreducible" is wanting the nature of reality to in some sense "do" this differentiation "for us".

And yes I would say that "qualia" insists on dualism.