The balance between clear and concise will vary depending on how familiar you are with the language in question.
the obfuscated C contest shows clear examples where concise is far more important than clear.
But the line itself if rather fuzzy.
hijacking an example from elsewhere. If you have a bucket filled with water and start punching holes in the bottom, when does it stop being a bucket that leaks and start being a sieve? At some point it will be very clear that you have passed the line, but exactly where the line is is hard to define.