A document about a venerable genus (7)

I believe the answer is:

papaver

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'genus' is the definition.
(Papaver is an example)

'a document about a venerable' is the wordplay.
'a document' becomes 'paper' (e.g. scientific paper, white paper).
'about' indicates putting letters inside.
'venerable' becomes 'v' (this could be a standard abbreviation I've not previously seen).
'a'+'v'='av'
'paper' going around 'av' is 'PAPAVER'.

Can you help me to learn more?

(Another definition for papaver that I've seen is " Poppy".)

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

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