Criminals seek uprising about a fine (5)
I believe the answer is:
mafia
'criminals' is the definition.
(I've seen this before)
'seek uprising about a fine' is the wordplay.
'seek uprising' becomes 'maia' (I can't justify this - if you can you should give a lot more credence to this answer).
'about' is an insertion indicator.
'a fine' becomes 'f' (abbreviation in pencil classifications).
'maia' enclosing 'f' is 'MAFIA'.
Can you help me to learn more?
(Other definitions for mafia that I've seen before include "Our family" , "Sicilian criminal body" , "Criminal organisation with origin in Sicily" , "Sicilian criminals" , "Group exerting a hidden sinister influence" .)