Carriage twice tours north doing odd jobs (7)

I believe the answer is:

gigging

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'doing odd jobs' is the definition.
I can't tell whether this definition defines the answer.

'carriage twice tours north' is the wordplay.
'carriage' becomes 'gig' (gig is a kind of carriage**).
'twice' says to double the letters.
'tours' is an insertion indicator.
'north' becomes 'n' ('N' can be a synonym of 'north').
'gig' doubled is 'giggig'.
'giggig' placed around 'n' is 'GIGGING'.

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I've seen this clue in The Independent.

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