Potato bar (4)
I believe the answer is:
spud
This could be a double definition.
'potato' is the first definition.
(synonyms)
'bar' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
Can you help me to learn more?
(Other definitions for spud that I've seen before include "Charlotte perhaps" , "veg" , "short, stocky person" , "Potato (informal)" , "King Edward, say (slang)" .)