Freight carrier is back north and rudely pushes through (6,2)

I believe the answer is:

barges in

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'rudely pushes through' is the definition.
I can't judge whether this definition defines the answer.

'freight carrier is back north' is the wordplay.
'freight carrier' becomes 'barge' (I've seen this in another clue).
'back' says the letters should be written backwards.
'north' becomes 'N' (abbreviation).
'is' back-to-front is 'si'.
'barge'+'si'+'n'='BARGES IN'

'and' acts as a link.

Can you help me to learn more?

(Another definition for barges in that I've seen is " Gate-crashes, enters forcefully".)

I've seen this clue in the Sydney Morning Herald.

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