Rep set free - that's not yet generally available (10)

I believe the answer is:

prerelease

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

'not yet generally available' is the definition.
I can't judge whether this defines the answer.

'rep set free' is the wordplay.
'set' indicates an anagram (instruction to set the letters).
'free' becomes 'release' (to release someone is to free them).
'rep' with letters rearranged gives 'pre'.
'pre'+'release'='PRERELEASE'

'that's' is the link.

Can you help me to learn more?

I've seen this clue in The Daily Express.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.