Cheeky mischievous rubs causing troubles (8)
I believe the answer is:
perturbs
'troubles' is the definition.
(perturbing is a kind of troubling)
'cheeky mischievous rubs' is the wordplay.
'cheeky' becomes 'pert' (I've seen this before).
'mischievous' is an anagram indicator.
'rubs' with letters rearranged gives 'urbs'.
'pert'+'urbs'='PERTURBS'
'causing' is the link.
(Other definitions for perturbs that I've seen before include "Disquiets, troubles" , "Makes anxious and uneasy" , "is upsetting" .)