Odd clanks affected area of London (9)
I believe the answer is:
docklands
'area of london' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'odd clanks affected' is the wordplay.
'affected' indicates an anagram.
'odd'+'clanks'='oddclanks'
'oddclanks' is an anagram of 'DOCKLANDS'.
Can you help me to learn more?
(Other definitions for docklands that I've seen before include "E. London area" , "part of London" , "Redeveloped east London area" .)