In London town, one acting badly after X amount of brandy? (9)

'x amount of brandy?' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'in london town one acting badly' is the wordplay.
'in' indicates putting letters inside.
'london' becomes 'toten' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'town' becomes 't' (common abbreviation eg in football team names).
'one acting badly' becomes 'ham' (to ham is to overact).
'toten' placed around 't' is 'totten'.
'totten'+'ham'='TOTTENHAM'

'after' acts as a link.

Can you help me to learn more?