Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Smogon will not be promoting clans or battles between clans. We encourage you to form sub-communities and social groups but there will be no organized clan wars on Smogon. The closest you'll get are team tournaments with the largest being Smogon Premier League and World Cup of Pokemon.
Please pardon my own and other Smogonites coldness toward noobs. But seriously, ask yourself "Are clans necessary?" If you said yes, I am no longer sorry.