Visitor figured in conversation (5)
I believe the answer is:
guest
'visitor' is the definition.
(guest is a kind of visitor)
'figured in conversation' is the wordplay.
'figured' becomes 'guessed' (guessing is a kind of figuring).
'in conversation' shows a homophone (sound like).
'guessed' sounds like 'GUEST'.
(Other definitions for guest that I've seen before include "Person receiving another's hospitality" , "Visitor, lodger" , "Invitee" , "company" , "Someone invited" .)