Disturbed aristocratic clique? (5)

I believe the answer is:

upset

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'disturbed' is the definition.
(I know that disturbed can be written as upset)

'aristocratic clique?' is the wordplay.
'aristocratic' becomes 'up' (I can't justify this - if you can you should give a lot more credence to this answer).
'clique?' becomes 'set' (a clique is a social set).
'up'+'set'='UPSET'

Can you help me to learn more?

(Other definitions for upset that I've seen before include "Disturb or distress" , "overcome" , "Surprising result" , "Out of sorts" , "Unhappy - unexpected defeat" .)

I've seen this clue in The Irish News.

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