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.

(I don't think I'm smarter than Robert C. Martin. I think that people who write the kind of 'Clean Code' Mr Martin describes don't need to resort to using "cleaner" as a bludgeon. They can explain why a particular solution follows the practices, patterns and principles described in his book.)