Yes, a business matter.

Had a business matter to tidy up.

I was having a business matter

An unexpected, urgent business matter has arisen.

- A friend of yours? - A small business matter.

As it is, I'm helping her with business matters.

So, you see, it is only a business matter.

What's the matter, busy man?

Bill, why at this juncture... are you letting yourself be so concerned by business matters?

We spoke of practical things... the children's future and business matters.