This. Clean and correct, but correct above all else.

A correct solution, even when not clean, isn't going to earn money. No one (except perhaps textbook publishers) will pay for a solution that is clean alone.

You can clean up a correct solution at a later date, all the while maintaining correctness; a clean (but incorrect) solution might need to be completely redesigned to make it correct.

I've come to accept that the best engineers are those who ship (you don't get to 10x productivity if you don't ever ship) and that often means being able to call the correct compromises to make. Heck, I'd even say engineering in general is finding a working compromise given a set of constraints.