Reform urged: beg one to correct errors (8)

I believe the answer is:

debugger

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'one to correct errors' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'reform urged beg' is the wordplay.
'reform' indicates anagramming the letters (letters in a new form).
'urged'+'beg'='urgedbeg'
'urgedbeg' with letters rearranged gives 'DEBUGGER'.

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(Another definition for debugger that I've seen is " Windows cleaned by one".)

I've seen this clue in The Times.

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