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A barge touring London's outskirts? It won't stop until morning (10)

Ross

I think it could be either:

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10

3-7

allnighter

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'it won't stop until morning' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'a barge touring london's outskirts?' is the wordplay.
'barge' becomes 'lighter' (synonyms).
'touring' is an insertion indicator (tour can mean to go around).
'outskirts?' suggests removing the centre (I've seen 'outskirts of' mean this).
'london' with its centre taken out is 'ln'.
'lighter' placed around 'ln' is 'llnighter'.
'a'+'llnighter'='ALLNIGHTER'

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I've seen this clue in The Times.
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