Crossword Genius

Took the main course but possibly not a sweet (4,2,3)

Ross

I believe the answer is:

went to sea

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'took the main course' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'possibly not a sweet' is the wordplay.
'possibly' indicates anagramming the letters.
'not'+'a'+'sweet'='notasweet'
'notasweet' with letters rearranged gives 'WENT TO SEA'.

'but' is the link.

Can you help me to learn more?

I've seen this clue in The Globe and Mail and The Irish Independent.
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