Got involved in someone else's business? (6)
I believe the answer is:
merged
'got' is the definition.
The answer and definition can be both related to change as well as being past participle verbs.
Perhaps you can see an association between them that I don't see?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for merged that I've seen before include "Coalesced" , "Got together" , "Amalgamated" , "United or blended." , "Combined to form a single entity" .)