It's a risky business for officer covering up a wrongdoing (6)
I believe the answer is:
casino
'it's a risky business' is the definition.
I can't tell whether this definition defines the answer.
'officer covering up a wrongdoing' is the wordplay.
'officer' becomes 'co' (Commanding Officer abbreviation).
'covering up' means one lot of letters goes inside another.
'wrongdoing' becomes 'sin' (sin is a kind of wrongdoing**).
'a'+'sin'='asin'
'co' placed around 'asin' is 'CASINO'.
'for' is the link.
Can you help me to learn more?
(Other definitions for casino that I've seen before include "Gaming-house" , "Where our betters show" , "Where one may gamble" , "gambling organisation" , "Gaming place" .)