Callers, guests (8)
I believe the answer is:
visitors
This clue is a double definition.
'callers' is the first definition.
(I've seen this before)
'guests' is the second definition.
(I've seen this before)
(Other definitions for visitors that I've seen before include "They call socially or on business" , "Callers or tourists" , "away team" , "'Callers, guests (8)'" , "They come to call, or holiday makers" .)