Crossword Genius

Displeased with what is of higher class? (5)

Ross

I believe the answer is:

upset

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

'displeased' is the definition.
(I've seen this in another clue)

'higher class?' is the wordplay.
'higher' becomes 'up'.
'class?' becomes 'set' (I've seen this before).
'up'+'set'='UPSET'

'with what is of' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for upset that I've seen before include "Out of sorts" , "Trouble" , "Disturbed or inverted" , "Shock result!" , "overcome" .)

I've seen this clue in the Evening Standard.
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