Swindles are obviously not on the level (5)
I believe the answer is:
ramps
'swindles' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot understand how they can define each other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for ramps that I've seen before include "Slopings passages" , "Gradients" , "Sloping passages" , "Slopes to calm traffic" , "Small road ridges for prams" .)