Chancy affair where spinning round might get you shot? (7,8)
I believe the answer is:
russian roulette
'chancy affair' is the definition.
The definition suggests a singular noun which matches the answer.
'spinning round might get you shot?' is the wordplay.
I cannot quite see how this works, but
'round' could be 'o' (round can mean a round object) and 'o' is found in the answer.
'get' could be 'let' (letting is a kind of getting) and 'let' is found within the answer.
'you' could be 'u' (commonly used in online communication) and 'u' is found in the answer.
This explanation may well be incorrect...
'where' acts as a link.
Can you help me to learn more?
(Other definitions for russian roulette that I've seen before include "suicidal undertaking" , "risky business" , "deadly stunt" , "Dangerous game of chance" , "highrisk game" .)