Crossword Genius

Divulge secrets - through a breach of security? (4,3)

Ross

I believe the answer is:

leak out

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

'breach of security?' is the definition.
Although both the answer and definition are verbs in their base form, I don't understand how one could define the other.

'divulge secrets through a' is the wordplay.
I cannot quite see how this works, but
'divulge' could be 'leak' (leaking is a kind of divulging) and 'leak' is present in the answer.
The remaining letters 'out' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for leak out that I've seen is " Become known despite effort ot maintain secrecy".)

I've seen this clue in The Globe and Mail.
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