Yeast source may provide flavour for Chinese food (6,5)

'yeast source may' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'flavour for chinese food' is the wordplay.
'flavour' becomes 'sauce' (saucing is a kind of flavouring).
'for' says to put letters next to each other (I've seen this in other clues).
'chinese food' becomes 'oyster' (oyster is a kind of food. I am not sure about the 'chinese' bit.).
'sauce' put after 'oyster' is 'OYSTER SAUCE'.

'provide' acts as a link.

Can you help me to learn more?