I'm with EV and EA on this one. The theme was guessable after only three of the 13 had been solved, and the method of entry became apparent at that stage as well, leading to a groan of exasperation at the slog that clearly lay ahead. The second quote fell out of the (relatively easy) across clues not long after, which made the first quote a strong probability. (Is an accent necessary or not? We're not told.)
Apart from a bit of short-lived grid-staring, that was as much fun as there was to be had. Like Jim360 I found the top right corner a bit of a chore, but I got there in the end.
Using the conventional method of resolving ambiguities left me with none to be agonised over, so the third line appeared in full without any need for a final choice. Were others held up by it?
Upsetter, I think there is a departure from thematic spelling if you consider the third word, although Google suggests that the version used is the correct one.