Labour follower: “Half of London is a corrupt place” (7)
I believe the answer is:
babylon
'a corrupt place' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'labour follower half of london' is the wordplay.
'labour follower' becomes 'baby' (I am not sure about this - if you are sure you should believe this answer much more).
'half of' indicates taking half.
'london' with half the letters taken is 'lon'.
'baby'+'lon'='BABYLON'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for babylon that I've seen before include "Bony lab found in the ancient city" , "Wicked city of the Bible, on Euphrates river in central Iraq" , "Ancient ruined city in modern Iraq" , "Sinful city in Biblical times, had Hanging Gardens" , "Bony lab in the old city of Mesopotamia" .)