My first post for quite a while, and late coming to this thread. I quite liked this one, understanding the instructions and getting a good start. Of course, I had to guess at first which way round to enter the solutions, and got it wrong.
Eventually I worked out that the "c" answer was one indicator, but I am still not convinced about the second. However, it makes no difference; I just have to work through it all again, interchanging across and down as appropriate.
Incidentally, the second "I" is a cocktail that I had never heard of, but found in Roget.