A call from the mob? (4)
I believe the answer is:
ring
This clue is a double definition.
'a call' is the first definition.
(thesaurus)
'the mob?' is the second definition.
('ring' can be a synonym of 'mob')
'from' is the link.
(Other definitions for ring that I've seen before include "13's story of a 17" , "Phone; circular band" , "Chime" , "Circular object - sound" , "Buzz" .)