Still 0-0? (4)
I believe the answer is:
'still' is the definition.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for even that I've seen before include "Smooth, level" , "Still - divisible by two" , "Flat, level" , "(Of a number) divisible by 2" , "Equable" .)