Crossword Genius

Epic place where many live in wisdom (8)

Ross

I believe the answer is:

sagacity

I'm a little stuck... Click here to teach me more about this clue!

'wisdom' is the definition.
(I know that sagacity is a type of wisdom)

'epic place where many live in' is the wordplay.
'epic' becomes 'saga' (I've seen this before).
'place where' becomes 'ity' (I can't explain this - if you can you should believe this answer much more).
'many' becomes 'c' (C is the Roman numeral for i00).
'live in' is an insertion indicator.
'saga'+'ity'='sagaity'
'sagaity' enclosing 'c' is 'SAGACITY'.

Can you help me to learn more?

(Other definitions for sagacity that I've seen before include "City saga illustrating insight or wisdom" , "Good judgement, wisdom or shrewdness" , "It's a cagy kind of wisdom" , "A gas city for wisdom and know-how" , "showing wisdom" .)

I've seen this clue in The Telegraph.
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