Cast, well-organized, assembled quickly (6,8)

I believe the answer is:

thrown together

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

'assembled quickly' is the definition.
The definition and answer can be both to do with creating things as well as being past participle verbs.
Maybe you can see a link between them that I can't see?

'cast well-organized' is the wordplay.
'cast' becomes 'thrown' (cast can mean to throw).
'well organized' becomes 'together' (I can't justify this - if you can you should believe this answer much more).
'thrown'+'together'='THROWN TOGETHER'

Can you help me to learn more?

I've seen this clue in The Sunday Times and The Times.

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.