Cleaner [klee-ner] adj
1. characteristic valued by a programmer's personal preference for something that cannot otherwise be justified using accepted Software Engineering principles: This approach increases cyclomatic complexity and reduces encapsulation. It's cleaner, do it.
No, I don't think I'm smarter than Robert C. Martin. I think that people who write the kind of code Mr Martin preaches don't need to resort to using "cleaner" as a bludgeon. They can explain naturally and fluidly how a particular solution follows the practices, patterns and principles that make for 'clean code.')