Phone group of criminals? (4)
I believe the answer is:
ring
This clue is a double definition.
'phone' is the first definition.
(synonyms)
'group of criminals?' is the second definition.
(Other definitions for ring that I've seen before include "Sound a doorbell" , "Besiegers' formation" , "Contact" , "It's carried by Frodo" , "Circus space; surround" .)