The less arrogant version of edmorel's response .. set up an appointment with an orthodontist. He's the only guy that will be able to tell you if clear braces will work or not. Your question is equivilent to asking "will this particular version of chemotheropy work on my unknown cancer?".
Generally though .. you need pretty straight teeth for clear braces to work. Any major realignment regardless of age is usually not recommended. My teeth were fairly crooked, nothing disfiguring, but noticable. Got a "absolutely not" from my orthodontist when I asked if it was an option.
And define "clear braces" .. I'm guessing you are taking about the plastic "mouthguard-like" inserts, and not the ceramic braces. Ceramic braces are normal braces but with clear ceramic brackets.
I have ceramic brackets, and only cost $100 extra over traditional steel braces. When my teeth are clean, and when talking with people who don't know I have braces .. they can't tell. I had a conversation with my cousin for 20 minutes and she only noticed the braces after I mentioned them.