Kiss, adjusting stride on piste (3,5)
I believe the answer is:
ski slope
'piste' is the definition.
(I've seen this before)
'kiss adjusting stride on' is the wordplay.
'adjusting' indicates anagramming the letters.
'stride' becomes 'lope' (I've seen this before).
'on' means one lot of letters go next to another.
'kiss' is an anagram of 'skis'.
'skis'+'lope'='SKI-SLOPE'
(Other definitions for ski slope that I've seen before include "downhill" , "Piste" , "smooth run" , "sports venue" .)