Piece written about wine vintage (9)

I believe the answer is:

reportage

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'piece written about wine vintage' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'about wine vintage' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'wine' becomes 'port' (port is a kind of wine).
'vintage' becomes 'age'.
're'+'port'+'age'='REPORTAGE'

Can you help me to learn more?

(Other definitions for reportage that I've seen before include "Factual journalism" , "Press accounts" , "Style of one making documentary" , "News presentation" , "Journalist's work" .)

I've seen this clue in The Irish Times.

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