A revolutionary toy (3)
I believe the answer is:
top
This clue could be a double definition.
'a revolutionary' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'toy' is the second definition.
(I know that top is a type of toy)
Can you help me to learn more?
(Other definitions for top that I've seen before include "Highest point or position" , "Kill" , "The circus tent can be a big one" , "Acme or apex" , "Best" .)