Not this kind of cap for gangsters? (3)
I believe the answer is:
This could be a double definition.
'not this kind of cap' is the first definition.
'mob' can be an answer for 'kind of cap' (I've seen this before). I'm not sure about the rest of the definition.
'gangsters?' is the second definition.
(mob can mean the Mafia)
'for' is the link.
Can you help me to learn more?
(Other definitions for mob that I've seen before include "Unruly lot" , "Kind of cap" , "Crowd round" , "Unruly crowd" , "Mafiosi" .)