The plot of the anime series is extended, featuring 52 Clow Cards from the manga's original 19, and certain scenes are stretched and delayed, such as Cerberus' true form not being revealed until just before Yue's appearance [REF].
Cardcaptor Sakura: Clear Card Edition starts at the point where the first series ends, when Sakura starts junior high school along her friends, including Syaoran, who had just returned to Tomoeda.