There are at least eight bands/artists named Clear: 1) A folk-rock band from minnesota;
2) A Slovak pop(-rock) band;
3) A hardcore band;
4) Another hardcore band;
5) A solo noise project started by Jesi.L in June of 2007;
6) An electropop band from Japan　- Ｃｌｅａｒ;
7) An english guitar pop band, formed in london in 1997.
8) A japanese singer who covers vocaloid and anime songs. He posts his covers in nico nico douga.
9) A canadian band started in the 1990's by the late Kenny MacLean, that released an album entitled "Clear - A Project By Kenny MacLean" in 1995.

Read more about Clear on Last.fm.