Dilapidated slum door, something beaten alone (4,4)

I believe the answer is:

drum solo

'something beaten alone' is the definition.

'dilapidated slum door' is the wordplay.
'dilapidated' indicates an anagram.
'slum'+'door'='slumdoor'
'slumdoor' is an anagram of 'DRUM SOLO'.

I've seen this clue in The Times.

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