Revolutionary sport? (7)
I believe the answer is:
cycling
This might be a double definition.
'revolutionary' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'sport?' is the second definition.
(I know that cycling is a type of sport)
Can you help me to learn more?
(Other definitions for cycling that I've seen before include "Going by bike" , "pursuit for example" , "Pedalling" , "Moving on two wheels" , "Riding a bike" .)