Had a business get-together (6)
I believe the answer is:
merged
'had a business get-together' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Maybe you can see a link between them that I don't see?
'had a business get-together' is the wordplay.
I cannot really understand how this works, but
'had' could be 'd' (I've seen this in other clues) and 'd' is located in the answer.
'get together' could be 'merge' (I've seen this in another clue) and 'merge' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for merged that I've seen before include "Came together" , "Coalesced" , "Got together" , "Combined to form a single entity" , "United or blended." .)