A charitable group located in British city (6)

I believe the answer is:

bangor

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'city' is the definition.
(I've seen this before)

'a charitable group located in british' is the wordplay.
'charitable group' becomes 'ngo' (I can't justify this - if you can you should believe this answer much more).
'located in' is an insertion indicator.
'british' becomes 'br' (abbreviation for British).
'a'+'ngo'='ango'
'ango' put into 'br' is 'BANGOR'.

Can you help me to learn more?

(Other definitions for bangor that I've seen before include "Welsh resort" , "Welsh city" , "Grab on in the Northern town" , "Welsh town" , "North Wales university" .)

I've seen this clue in The Times.

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