Crossword Genius

A revolutionary toy (3)

Ross

I believe the answer is:

top

I'm a little stuck... Click here to teach me more about this clue!

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" .)

I've seen this clue in The Globe and Mail.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.