Crossword Genius

Get involved in someone else's business? (5)

Ross

I believe the answer is:

merge

I'm a little stuck... Click here to teach me more about this clue!

'get' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for merge that I've seen before include "Join into one" , "Combine into one" , "Amalgamate" , "Join, blend" , "Fuse" .)

I've seen this clue in The Globe and Mail.
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