It justifies a game I introduced to Georgia (8)

I believe the answer is:

apologia

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'it justifies' is the definition.
The definition suggests a singular noun which matches the answer.

'a game i introduced to georgia' is the wordplay.
'game' becomes 'polo' (polo is a kind of game).
'introduced to' indicates putting letters inside.
'georgia' becomes 'ga'.
'i' placed within 'ga' is 'gia'.
'a'+'polo'+'gia'='APOLOGIA'

Can you help me to learn more?

(Other definitions for apologia that I've seen before include "Written defence of one's conduct" , "Formal defence of one's conduct" , "form of defence" , "Formal defence of one's actions" , "sort of defence" .)

I've seen this clue in The Guardian.

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