Breaks code of silence over government's wrongdoings (5)

I believe the answer is:

sings

'breaks code of silence' is the definition.

'over government's wrongdoings' is the wordplay.
'over' is an insertion indicator.
'government' becomes 'g' (abbreviation for government).
'wrongdoings' becomes 'sins' (sin is a kind of wrongdoing).
'g' going within 'sins' is 'SINGS'.

(Another definition for sings that I've seen is " Chants".)

I've seen this clue in The Independent.

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