Leading lady disseminating OC trivia (8)

I believe the answer is:

victoria

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'leading lady' is the definition.
'Victoria' can be an answer for 'lady'. I am unsure of the 'leading' bit.

'disseminating oc trivia' is the wordplay.
'disseminating' is an anagram indicator (disseminate can mean to spread around).
'oc'+'trivia'='octrivia'
'octrivia' anagrammed gives 'VICTORIA'.

Can you help me to learn more?

(Other definitions for victoria that I've seen before include "Queen, Australian state and plum" , "It's the end of the line" , "Queen and Falls" , "Monarch" , "British queen" .)

I've seen this clue in The Independent.

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