Consider the sentence:
I have a banker friend, and she says that interest rates are going up.
Here a banker friend is being used to mean a friend who is a banker. Is there a name for this kind of construction?
It is similar to a noun adjunct, but it seems to me the examples there don't seem to fit this case exactly. In those, the pair (or sequence) of nouns stands in for a prepositional phrase, but in a friend who is a banker there is no preposition. The notion of a noun adjunct would seem to apply better to a sentence like
The new finance minister is well known as a banker friend.
Here banker friend stands for the prepositional phrase a friend of bankers. That seems quite different from my first example.