An attractive bar, perhaps (6)
I believe the answer is:
magnet
'bar perhaps' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for magnet that I've seen before include "drawer?" , "Source of attraction" , "Attractive item" , "Centre of attraction" , "Attractive type" .)