I step over the slope (5)
I believe the answer is:
piste
'the slope' is the definition.
(I have seen 'slippery slope' mean 'piste' so perhaps 'slope' could also mean 'piste')
'i step over' is the wordplay.
'over' indicates anagramming the letters.
'i'+'step'='istep'
'istep' with letters rearranged gives 'PISTE'.
(Other definitions for piste that I've seen before include "slippery slope" , "Winter sports course" , "Skiing run" , "A ski run of compacted snow" , "strip of fencing" .)