Toy revolver (3)
I believe the answer is:
top
This clue could be a double definition.
'toy' is the first definition.
(I know that top is a type of toy)
'revolver' is the second definition.
The answer and definition 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 top that I've seen before include "Upper side" , "Zenith" , "Spinner" , "Best" , "Uppermost part" .)