Generosity from capital of Slovenia, reportedly? (8)

I believe the answer is:

largesse

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'generosity' is the definition.
(I know that largesse is a type of liberality)

'from capital of slovenia reportedly?' is the wordplay.
'from' becomes 'larges' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'capital of' indicates taking the first letters.
'reportedly?' becomes 'e' (I've seen this in other clues).
The first letter of 'slovenia' is 's'.
'larges'+'s'+'e'='LARGESSE'

Can you help me to learn more?

(Other definitions for largesse that I've seen before include "Magnanimous bestowal of gifts" , "charity" , "Eelgrass (anag.)" , "Generous alms" , "Generosity in giving gifts" .)

I've seen this clue in The Telegraph.

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