More rum for visitor (8)
I believe the answer is:
stranger
This clue is a double definition.
'more rum' is the first definition.
(rum can mean strange)
'visitor' is the second definition.
(I've seen this before)
'for' acts as a link.
(Other definitions for stranger that I've seen before include "Outsider" , "Unfamiliar person" , "One who is little known" , "More unfamiliar or odd" , "More exotic" .)