Such dishonesty is trivial (8)
I believe the answer is:
fiddling
'is trivial' is the definition.
(synonyms)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for fiddling that I've seen before include "petty" , "wasting time?" , "Cooking the books" , "Tinkering - trifling" , "Such swindles may be" .)