Visitor (5)
'visitor' is the definition.
(I know that guest is a type of visitor)
This is the entire clue.
(Other definitions for guest that I've seen before include "One receiving hospitality" , "Recipient of hospitality" , "Invitee" , "Customer of a hotel" , "Invited visitor" .)
'visitor' is the definition.
(caller is a kind of visitor)
This is all the clue.
(Other definitions for caller that I've seen before include "Visitor" , "Someone phoning" , "One paying a brief visit" , "Person on the line" , "One visits" .)