Self-satisfied know-all oddly calmed by decision to throw out Thailand and Cambodia (6,4)

I believe the answer is:

clever dick

I'm a little stuck... Click here to teach me more about this clue!

'self-satisfied know-all' is the definition.
'clever dick' can be an answer for 'know-all' (I've seen this before). I am not sure about the 'self-satisfied' bit.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for clever dick that I've seen before include "Know-all" , "The one with all the answers" , "Wise guy" .)

I've seen this clue in The Independent.

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