Humiliating return from a summit meeting? (8)

I believe the answer is:

comedown

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'humiliating' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

(Other definitions for comedown that I've seen before include "Do cowmen experience a loss of status?" , "Humiliating" , "Descent to a lower status" , "Decline in status" , "Feeling of disappointment" .)

I've seen this clue in The Globe and Mail.

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