Just 2 weeks of clen along won't do much. What is your goal?...
The clen could be helpful for retaining muscle mass from your cycle if used right afterward. ALso, it will keep you mind busy and might help with post cycle depression if used in the next few weeks afterward. (I don't think it will impair recovery.)
However, its a good idea to keep kcal high during those two weeks, to help hold on to muscle. Clen can inhibiti appetite and in using it, you may (simply out of human nature), jump right into a cutting cycle and lose weight (and muscle ) too fast.
Again, all depends on what you're trying to accomplish.
2 weeks of clen witha some strict dieting in the middle of your 12 weeks off could be a good way to break up your off-time bulking and jump start your appetite. (I often intersperse a couple weeks of dieting when bulking to do this.)
-Randy