Port, or what's left after opening of bottle (5)
I believe the answer is:
split
I believe this is a quadruple definition!!
'port' is the first definition.
(I've seen this before)
'or' is a link.
'what's left' is the second definition.
(split can mean to run away or leave)
'after' is a link.
'opening' is the third definition.
(split is a kind of opening)
'of' is a link.
'bottle' is the fourth definition.
(I know that split is a type of bottle)
(Other definitions for split that I've seen before include "Break open suddenly" , "Sliced < peach" , "Ripped" , "Mediterranean port" , "Division - divorce" .)