Enrage VIP carved up by news network? (9)

I believe the answer is:

grapevine

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'news network?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'enrage vip carved up' is the wordplay.
'carved up' is an anagram indicator.
'enrage'+'vip'='enragevip'
'enragevip' with letters rearranged gives 'GRAPEVINE'.

'by' acts as a link.

Can you help me to learn more?

(Other definitions for grapevine that I've seen before include "where fruit is grown" , "fruit producer" , "Private source of information" , "Bush telegraph" , "source of rumour" .)

I've seen this clue in The Guardian.

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