Doctor accepts being dismissed, so stops being heard (6,3)

I believe the answer is:

drowns out

'stops being heard' is the definition.
(to drown something out is to make it inaudible)

'doctor accepts being dismissed' is the wordplay.
'doctor' becomes 'dr' ('Dr' can be a synonym of 'doctor').
'accepts' becomes 'owns' (both can mean admits).
'being dismissed' becomes 'out' (in cricket, to be out is to be dismissed).
'dr'+'owns'+'out'='DROWNS OUT'

'so' is the link.

I've seen this clue in The Guardian.

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