Crips or Bloods (4)
I believe the answer is:
gang
'crips or bloods' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gang that I've seen before include "go to Scotland" , "Group (crazy or criminal?)" , "Men working" , "Group; clique" , "Working group or mob of hoodlums" .)