Did a song about Latin lingo (5)

I believe the answer is:

slang

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'lingo' is the definition.
(I know that lingo can be written as slang)

'did a song about latin' is the wordplay.
'did a song' becomes 'sang' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'about' is an insertion indicator.
'latin' becomes 'l'.
'sang' placed around 'l' is 'SLANG'.

Can you help me to learn more?

(Other definitions for slang that I've seen before include "See 15" , "Any class's jargon" , "abuse" , "colloquialisms" , "Be abusive" .)

I've seen this clue in the Sydney Morning Herald.

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