Superior group displaced (5)
I believe the answer is:
upset
'displaced' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives can sometimes mean the same thing.
'superior group' is the wordplay.
'superior' becomes 'up' (I can't explain this - if you can you should believe this answer much more).
'group' becomes 'set' (both can mean a collection).
'up'+'set'='UPSET'
Can you help me to learn more?
(Other definitions for upset that I've seen before include "Disrupted; knock over" , "Shock result!" , "Surprise win" , "Surprise result" , "Indisposition" .)