Took off coat and hung out (6,2)
I believe the answer is:
caught on
'took' is the definition.
The answer and definition can be both related to change as well as being past participle verbs.
Maybe there's an association between them I don't understand?
'coat and hung out' is the wordplay.
'and' says to put letters next to each other.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'coat'+'hung'='coathung'
'coathung' with letters rearranged gives 'CAUGHT ON'.
'off' acts as a link.
Can you help me to learn more?
(Another definition for caught on that I've seen is " Comprehended - became fashionable".)