Stop calling drummer loudly (4,3)

I believe the answer is:

ring off

'stop calling' is the definition.
(as in to ring off a phonecall)

'drummer loudly' is the wordplay.
'drummer' becomes 'ringo' (Ringo Starr).
'loudly' becomes 'ff' (a musical term).
'ringo'+'ff'='RING OFF'

(Other definitions for ring off that I've seen before include "Put the phone down" , "sign engagement's terminated?" , "Christian --, fashion designer" , "Terminate a call" , "End a phone call" .)

I've seen this clue in The Guardian.

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