Has auditor's arduous assignment become slightly less risky? (9)
I believe the answer is:
hazardous
'risky?' is the definition.
(synonyms)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for hazardous that I've seen before include "Involving risk or danger" , "Very risky, dangerous" , "Perilous" , "Carrying risk, dangerous" , "Unsafe" .)