Show disrespect to area covered by e.g. Bordeaux after visit (4,2,4)

'visit' is the definition.
Although both the answer and definition are verbs in their base form, I can't understand how they can define each other.

'show disrespect to area covered by e g bordeaux' is the wordplay.
I cannot quite see how this works, but
'area' could be 'a' (maths abbreviation) and 'a' is found within the answer.
'covered' could be 'in' (I've seen this in other clues) and 'in' is located in the answer.
'e' is found in the answer.
'g' could be 'k' (synonyms) and 'k' is present in the answer.
'show' could be 'tv' (TV show is an example) and 'tv' is found in the leftover letters.
The remaining letters 'ain' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'after' acts as a link.

Can you help me to learn more?