Hopeless, after Bishop released stuff not meant for release? (4)

I believe the answer is:

leak

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

'release?' is the definition.
(I have seen 'Accidental release ' mean 'leak' so perhaps 'release' could also mean 'leak')

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for leak that I've seen before include "Accidental escape of water from lake" , "Disclose unauthorised information" , "Seep; disclose" , "Ooze" , "Secrecy breach" .)

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.