Port still on the table after dinner? (4)
I believe the answer is:
left
I believe this clue is a double definition.
'port' is the first definition.
(port is the left side on a boat)
'still on the table after dinner?' is the second definition.
(as in leftover food)
(Other definitions for left that I've seen before include "The sinister side" , "Withdrew - Labour" , "political group" , "Communist?" , "Allowed to remain" .)