Gangster involved in bloodshed everywhere (6)
I believe the answer is:
galore
'everywhere' is the definition.
(thesaurus)
'gangster involved in bloodshed' is the wordplay.
'gangster' becomes 'al' (Al Capone).
'involved in' means one lot of letters goes inside another.
'bloodshed' becomes 'gore' (synonyms).
'al' going into 'gore' is 'GALORE'.
(Other definitions for galore that I've seen before include "abundantly" , "to spare" , "Lots of" , "Lo, Reg, a change could be in abundance" , "Pussy ---, Bond girl" .)