You should read this, otherwise this puzzle won't make any sense, fair warning
The idea of these "wraparound" puzzles is to play with 3D space in a 2D puzzle. I like think about taking the grid printed out on paper and curling it into a tube, so the left edge of the grid meets the right edge. The acrosses are broken up into 3-letter answer "fragments". Each fragment makes the start of one word, and can also be the end of another word. In this puzzle, the fragment that starts the word is given the clue, and I've highlighted the fragment that ends the word for convenience. The downs act completely normally. Or do they? (They do). If that makes sense to you, go solve it now, I apologize in advance for some of the grid jank. If you don't get it, here's an example.
Let's say a row reads:
MER | LIN | DOR
You can probably immediately see MERLIN (Arthur's pal) and LINDOR (Mets SS Francisco), but with the wrap-around you also get DORMER (Upstairs window). That's a less elegant one, but, then, there's a reason it didn't make the puzzle.