Putting on sound preparation for leather (7)
I believe the answer is:
dubbing
This clue could be a double definition.
'putting on sound preparation' is the first definition.
The answer and definition can be both to do with communicating as well as being present participle verbs.
Maybe there's a link between them I don't understand?
'leather' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'for' acts as a link.
Can you help me to learn more?
(Another definition for dubbing that I've seen is " name-calling?".)