Contacts with the mobs (5)
I believe the answer is:
rings
'the mobs' is the definition.
('ring' can be a synonym of 'mob')
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for rings that I've seen before include "Identifies bird" , "Marks that are made round" , "They fix the markets" , "Telephones" , "that may circle planet (not ours)" .)