Action organised to catch gangster going to a part of Spain (9)
I believe the answer is:
catalonia
'part of spain' is the definition.
('Catalonia' is part of 'spain')
'action organised to catch gangster going to a' is the wordplay.
'organised' indicates an anagram.
'to catch' is an insertion indicator.
'gangster' becomes 'al' (Al Capone).
'going to' is a charade indicator (letters next to each other).
'action' anagrammed gives 'catoni'.
'catoni' enclosing 'al' is 'cataloni'.
'cataloni'+'a'='CATALONIA'
(Other definitions for catalonia that I've seen before include "part of Spain" , "secessionist area" , "autonomous region" , "NE region of Spain" .)