Businessman drown seven? Rubbish! (4,6)

I believe the answer is:

news vendor

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

'businessman' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

'drown seven? rubbish' is the wordplay.
'rubbish' indicates an anagram (a poor quality or rubbish spelling of the letters).
'drown'+'seven'='drownseven'
'drownseven' anagrammed gives 'NEWS VENDOR'.

Can you help me to learn more?

(Another definition for news vendor that I've seen is " merchant in rag trade?".)

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

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