Prisoner you insult badly without stopping (12)

I believe the answer is:

continuously

'without stopping' is the definition.
(thesaurus)

'prisoner you insult badly' is the wordplay.
'prisoner' becomes 'con' (abbreviation for 'convict').
'badly' indicates an anagram.
'you'+'insult'='youinsult'
'youinsult' anagrammed gives 'tinuously'.
'con'+'tinuously'='CONTINUOUSLY'

(Another definition for continuously that I've seen is " Without interruption".)

I've seen this clue in The Telegraph.

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