Lecture conveying some vital knowledge (4)

I believe the answer is:

talk

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'lecture conveying' is the definition.
'talk' can be an answer for 'lecture' (synonyms). I'm not certain of the 'conveying' bit.

'some vital knowledge' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'TALK' can be found hidden inside 'vital knowledge'.

Can you help me to learn more?

(Other definitions for talk that I've seen before include "Utter" , "Discussion" , "See 10" , "Gas" , "Gossip - lecture" .)

I've seen this clue in the Evening Standard.

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