George, Oscar, Kay and Arthur driven to the limits by a boy-racer (2-4)
I believe the answer is:
go-kart
'racer' is the definition.
(I've seen this before)
'george oscar kay and arthur driven to the limits by a' is the wordplay.
I cannot really see how this works, but
'george' could be 'g' and 'g' is located in the answer.
'oscar' could be 'o' (phonetic alphabet: alpha, bravo, charlie etc.) and 'o' is present in the answer.
'kay' could be 'k' and 'k' is found within the answer.
'arthur' could be 'art' (I've seen this in other clues) and 'art' is found within the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).
'boy' is the link.
Can you help me to learn more?
(Other definitions for go-kart that I've seen before include "Lightweight racer" , "Small, low racer" , "Small motor-racing vehicle" , "Miniature racing car with skeleton body" , "Small racing vehicle (K, not C)" .)