Crossword Genius

Edible snails? Definitely not! (4,4)

Ross

I believe the answer is:

fast food

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'edible' is the definition.
(thesaurus)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for fast food that I've seen before include "Fish and chips, burgers, etc" , "Burgers or kebabs (but not snails!)" .)

I've seen this clue in The Sun.
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