Awful politician takes cocaine in a bunch of addresses (9)
I believe the answer is:
directory
'bunch of addresses' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'awful politician takes cocaine' is the wordplay.
'awful' becomes 'dire' (synonyms).
'politician' becomes 'tory' (term for a Conservative Party politician).
'takes' is an insertion indicator.
'cocaine' becomes 'C' (drugs abbreviation).
'dire'+'tory'='diretory'
'diretory' enclosing 'c' is 'DIRECTORY'.
'in a' acts as a link.
Can you help me to learn more?
(Other definitions for directory that I've seen before include "See 7" , "Reference book" , "Telephone information service" , "Book listing names of inhabitants, users etc" , "See 5" .)