Vietnamese course, plus piano, offered by middle school (3)

I believe the answer is:

pho

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'vietnamese course plus' is the definition.
I know nothing about this answer so I can't tell whether this works.

'piano offered by middle school' is the wordplay.
'piano' becomes 'p' (musical abbreviation).
'offered by' is a charade indicator (letters next to each other).
'middle' means to look at the middle letters.
The middle letters of 'school' are 'ho'.
'p'+'ho'='PHO'

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

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