Air or block oracle's interpretation (9)

I believe the answer is:

barcarole

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'air' 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?

'block oracle's interpretation' is the wordplay.
'block' becomes 'bar' (block can mean to ban or bar).
'interpretation' is an anagram indicator (I've seen this in other clues).
'oracle' with letters rearranged gives 'carole'.
'bar'+'carole'='BARCAROLE'

'or' acts as a link.

Can you help me to learn more?

(Other definitions for barcarole that I've seen before include "music of Venice" , "Venetian boat song" , "Italian song" , "musical composition" , "Gondolier's song" .)

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

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