Crossword Genius

Miniature toy stereotypically served as aphrodisiac (6)

Ross

I believe the answer is:

oyster

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

'as aphrodisiac' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'miniature toy stereotypically' is the wordplay.
'OYSTER' is hidden in amongst the letters.
However, I am uncertain how this is indicated.

'served' acts as a link.

Can you help me to learn more?

(Other definitions for oyster that I've seen before include "Marine bivalve" , "Tasty bivalve, may carry pearl" , "Pearl-yielding shellfish" , "one got out of bed?" , "Greyish pink" .)

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