Crows: "Bequests published! You can't escape the truth!” (6,4,3)

I believe the answer is:

murder will out

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'can't escape the truth' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'crows bequests published' is the wordplay.
'crows' becomes 'murder' (I've seen this before).
'bequests' becomes 'will' (I can't explain this - if you can you should give a lot more credence to this answer).
'published' becomes 'out' (a published book is 'out').
'murder'+'will'+'out'='MURDER WILL OUT'

'you' acts as a link.

Can you help me to learn more?

(Another definition for murder will out that I've seen is " truth always comes to light".)

I've seen this clue in The Times.

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