Crossword Genius

With onion cooked anise only (9)

Ross

I believe the answer is:

lyonnaise

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'with onion cooked anise only' is the definition.
I can't judge whether this definition defines the answer.

'cooked anise only' is the wordplay.
'cooked' indicates anagramming the letters.
'anise'+'only'='aniseonly'
'aniseonly' is an anagram of 'LYONNAISE'.

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(Other definitions for lyonnaise that I've seen before include "cooked in a way to make you cry?" , "Served with onions" , "(Of potatoes) cooked with onions in a wine sauce" , "cooking with onions" .)

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