It's okay to get confused once in a while if that confusion leads to new information. By getting encouraged to seek answers, you will be actively involved in the absorption of knowledge as you will be required to experience the process. That's how crosswords, in general, work. So here's a book that will serve as your bible of new information. Это и многое другое вы найдете в книге Mr. Puzzlers Sunday Crosswords. Mind Mixers Vol 5 (Speedy Publishing LLC)