District of London (4)
I believe the answer is:
soho
'district of london' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for soho that I've seen before include "Central London entertainment district" , "Exotic London district popular with tourists" , "Parts of London and New York City with the same name" , "Once notorious part of central London" , "District of London, noted for restaurants and nightclubs" .)