Tape river trip for pirate with papers (9)

I believe the answer is:

privateer

I'm a little stuck... Click here to teach me more about this clue!

'pirate with papers' is the definition.
I can't judge whether this definition defines the answer.

'tape river trip' is the wordplay.
'trip' is an anagram indicator.
'tape'+'river'='taperiver'
'taperiver' with letters rearranged gives 'PRIVATEER'.

'for' is the link.

Can you help me to learn more?

(Other definitions for privateer that I've seen before include "Drake, for example" , "Sailor may go on it" , "Privately-owned warship" , "Armed ship used in war but not government-owned" , "Government-commissioned vessel authorised to prey on enemy shipping" .)

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

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