Two ways of looking at Clive.
1) If you go on his show you expect to be teased. He is only joking, even though he can appear to be desperate to belittle someone. I saw him do it to Griff Rheese Jones too.
or...
2) He is arrogant, can talk over people, and can be directly insulting.
As I say, go prepared for that. OR if you're someone quick witted like Paul Merton or Stephen Fry, ridicule him back.