Crossword Genius

The antithesis of fast food in France, maybe accompanied by relish (5-4)

Ross

I believe the answer is:

snail-like

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

'the antithesis of fast food' is the definition.
I can't judge whether this definition defines the answer.

'france maybe accompanied by relish' is the wordplay.
'france maybe' becomes 'snail' (I can't explain this - if you can you should give a lot more credence to this answer).
'accompanied by' is a charade indicator (letters next to each other).
'relish' becomes 'like' (I've seen this in another clue).
'snail'+'like'='SNAIL-LIKE'

'in' is the link.

Can you help me to learn more?

I've seen this clue in The Independent.
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