Travel for nothing and get away with it perhaps (2,4)

I believe the answer is:

go free

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'get away with it perhaps' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'travel for nothing' is the wordplay.
'travel' becomes 'go' (synonyms).
'for nothing' becomes 'free' (I've seen this in another clue).
'go'+'free'='GO FREE'

'and' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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