What's EOF?
Edit: nvm found it! No it doesn't, as this is not dealing with EVM at all
I hate to sound sarcastic, but you answered your own question about an opaque acronym with another couple of opaque acronyms. And didn't repeat the answer that you found.
So what's EOF? What's EVM?
I happen to know that nvm probably means never mind, but that is not a given for other readers.
So, EOF is basically an object format for EVM (Ethereum Virtual Machine) bytecode. You can learn more here: https://evmobjectformat.org/. Clean is basically a DSL for writing zero-knowledge-proof circuits, so it is unrelated to the EVM.