Hi folks.
It is, as pointed by others, an internal face that shows through the outside face.
If you cannot delete that face because it is needed, for an internal view, for example, or because it is necessary for the geometry of the model, you can hide it for this particular view.
You may also use a layer that you will hide. Assign this face and any other that creates the same problem to this layer. Then, create a scene to save the setting for this layer. Create another scene, showing this layer and use it for inside views.
Then, clicking on scenes tab will get you the better of both worlds.
Just ideas.