Go round and call (4)
I believe the answer is:
ring
This clue is a triple definition!
'go' is the first definition.
(ringing is a kind of going)
'round' is the second definition.
(synonyms)
'and' acts as a link.
'call' is the third definition.
(telephone call)
(Other definitions for ring that I've seen before include "sign of union?" , "item to be fingered?" , "Chime" , "Make sound like phone" , "Group operating illegally < call" .)