I got it working, and I'll describe how I did it, but cannot imagine that this is the recommended approach.
First, I followed Andrew's instructions. Then, I went into the file system where the symbol I was using to represent the subcircuit was stored, and I copied its directory and its contents and renamed it 'spectre'. In particular I did the following ...
Code:cd .../mixer
cp -r symbol spectre
Once I did that, the spectre view appeared as one of the views and everything worked properly.
August