Visitors (7)
'visitors' is the definition.
(I know this)
This is all the clue.
(Other definitions for guests that I've seen before include "Invitees or hotel customers" , "Folk receiving hospitality" , "House or hotel visitors" , "Company" , "Hosts entertain them" .)
'visitors' is the definition.
(caller is a kind of visitor)
This is all the clue.
(Another definition for callers that I've seen is " Visitors".)