Central European Luge Cups not on the level? (6)
I believe the answer is:
sloped
'not on the level?' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for sloped that I've seen before include "Running downwards" , "Tilted, canted" , "Was inclined" .)