The team was originally formed in mid 1980s as a twelve member doujinshi circle however the team diminished to seven after their first professional debut in 1989 with the manga RG Veda. Of the remaining seven, three members left during the production of RG Veda. According to CLAMP, the team's name carries the meaning 'a pile of potatoes' though I can't find out why they named themselves after the crop.
CLAMP's production style is similar to that of animation production with Ageha Okawa acting as the group's spokeswoman, producer-director, and storyboarder while the other three often shuffling roles. Unlike most mangaka who specializes in a single genre, CLAMP has created a diverse body of works ranging from childish to teen-rated. Their works also embodies diverse visual styles as the art changes depending to the primary artist of a given project. Many of their works have been adapted into anime after release. Among their famous titles include X/1999, xxxHolic, Cardcaptor Sakura, Tsubasa Reservoir Chronicle, Code Geass, Wish, and Chobits.
The first work of CLAMP that I actually saw was X/1999 which had me totally captivated. Since then I had been a huge CLAMP fan. One of their unique features that I've always admired is the changing strokes between their different works. The fact that they do not belong to a particular genre does well to keep fans from getting jaded. The works of CLAMP is always something to look forward to - great art, great storytelling. What else could you ask for?