Take back angry tirade about London district (6)
I believe the answer is:
recant
'take back' is the definition.
(thesaurus)
'angry tirade about london district' is the wordplay.
'angry tirade' becomes 'rant' (I've seen this before).
'about' indicates putting letters inside.
'london district' becomes 'ec' (I can't justify this - if you can you should believe this answer much more).
'rant' placed around 'ec' is 'RECANT'.
Can you help me to learn more?
(Other definitions for recant that I've seen before include "Go back on former belief" , "Abjure, forswear" , "Renounce (a heretical belief)" , "Take back something said" , "Revoke a former declaration" .)