Where Jack can get a drink on the side (4)
I believe the answer is:
port
This could be a double definition.
'where jack can get a drink on the' is the first definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'side' is the second definition.
(port is a kind of side)
Can you help me to learn more?
(Other definitions for port that I've seen before include "Bordeaux, say" , "After-dinner drink" , "Left side of ship - red wine" , "Ship's left - Dover, perhaps" , "Stanley perhaps" .)