I've just printed this off. Seven squares in the grid are highlighted in red.
The instructions state "The seven highlighted letters will reveal the theme and they precede thirteen thematic lights. The remaining nine thematic lights are featured there. None of these twenty-two clues contains a thematic definition."
Please could somebody translate this into plain English for me? What are 'thematic lights' for goodness sake? It says 'nine thematic lights are featured there' - where is there???
I must say this is this first time a crossword has go me wound up before I've even started!
Thanks for the answer, dannyk13, but I'm none the wiser. It what sense do the seven letters 'precede' thirteen thematic lights? I still don't get where 'there' is.