See seven are made poorly eating supermarket crabs, for example (8,7)

'crabs for example' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'see seven are made poorly eating supermarket' is the wordplay.
I cannot quite understand how this works, but
'see' could be 'v' (Latin 'vide', used to direct a reader to a source) and 'v' is found in the answer.
an anagram of 'are' is 'rea' which is located in the answer.
This may be the basis of clue (or it may be nonsense).