Why is Astana even in cl, Kazachstan should be in Asia.
Just like Turkey, Kazakhstan has its small, western extremity in what is technically considered geographical Europe.
Another grey zone are the three Trans-Caucasian states of Armenia, Azerbaijan and Georgia. Some would say they are European, many would say otherwise.
Israel and Cyprus can also most accurately be described as Asian in the geographical sense, but due to political/linguistic/cultural reasons they have been considered European for many decades now.
Strictly speaking, all of Kazakhstan, Azerbaijan, Armenia, Georgia, Turkey, Israel and Cyprus can be considered as Asian, yet their clubs take part in European competition.