This is my best guess as to last week’s clue.
There were a couple of other options, but this seems the most likely. It kind of looks like a man who has had his spine ripped out through his neck. There would definitely be a lot of blood. If anyone has any other shots they think might be more likely, let me know.
UPDATE: Thanks to sigma, I now know that this poster was not the clue, so on to candidate number 2…
I didn’t choose this one first, because there has never been a clue that points to the title of the next episode before. But when you take the clock and after hours bar into account, this does seem more likely.