Stress rang changes to sin (10)
I believe the answer is:
transgress
'to sin' is the definition.
(I've seen this before)
'stress rang changes' is the wordplay.
'changes' indicates an anagram.
'stress'+'rang'='stressrang'
'stressrang' is an anagram of 'TRANSGRESS'.
(Other definitions for transgress that I've seen before include "Overstep, exceed" , "commit offence" , "Go beyond (legal) limits" , "Break (limit, law)" , "Cause offence" .)