All the rage, perfectly cool, causing offence (9)
I believe the answer is:
injustice
'offence' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'all the rage perfectly cool' is the wordplay.
'all the rage' becomes 'in' (both can mean trendy).
'perfectly' becomes 'just' (as in 'just so').
'cool' becomes 'ice' (icing is a kind of cooling).
'in'+'just'+'ice'='INJUSTICE'
'causing' is the link.
Can you help me to learn more?
(Other definitions for injustice that I've seen before include "wrong" , "Unfairness" , "It's unfair" , "Lack of fairness" .)