Higher groups experience disturbances (6)

I believe the answer is:

upsets

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'experience disturbances' is the definition.
'upsets' can be an answer for 'disturbances' ('upset' can be a synonym of 'disturbance'). I'm unsure of the 'experience' bit.

'higher groups' is the wordplay.
'higher' becomes 'up'.
'groups' becomes 'sets' (I've seen this in other clues).
'up'+'sets'='UPSETS'

Can you help me to learn more?

(Other definitions for upsets that I've seen before include "Capsizes or disturbs" , "Disapppointments" , "Reversals" , "Makes unhappy or worried" , "Unexpected results" .)

I've seen this clue in The Irish News.

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