I've reworded my explanation of today's theme seven times now. You know what they say: the eighth time's a charm!

Basketball JUMPERS riffed upon so that a synonym for JUMP break-jumps over an intermediate word. The two entries flanking the intermediate word go together, JUMPing over the middle. Finally, the broken synonym gets placed before the center word.
Maybe it's "the ninth time's a charm"?
Fixing up answers for our database is an issue Jim and I constantly struggle with. We have a general rule that the answers ought to match their clues. So we can't just leave MOBILE with a [iPhone download] clue, right? Do we fix it up to MOBILE APP matching that clue? (Yes.)
And how about [2020, but not 2019 or 2021]? We don't want confused folks wondering four years from now why WILL MADE SUCH AN EGREGIOUS ERROR OF COURSE 2021 IS A YEAR HE'S A MORON! So we ended up changing the entry to the full LEAP YEAR for our database.
Finally, we removed APP completely from this puzzle, since we wouldn't want it to show up in our database with a mysterious clue of [-].
The downside is that when people try dig up an old puzzle, they might remember that this puzzle has the word APP in it. Of course our Finder will turn up this puzzle if you enter APP, right?!
Cue the sad trombone.
I like what Erik and Andy did with their grid. If the trick wasn't interesting or flat-out confusing, ignore it and just enjoy the wealth of themeless-ESQUE material. PET CRATE, AD SALES, DIORAMA, GERMANE, TV MOVIE = a TORRENT of goodness from these ASTUDENTs.
Thursday is often my favorite day of the crossweek, looking forward to what tricksies them crazy constructors might pull. Today's schtick was something I've never quite seen before, but it didn't have as sharp of an a-ha moment as I'd have liked. More of a "how the heck am I going to explain this to confused emailers" one. Thankfully, the fill was colorful and clean, making the solve entertaining.