USA lotteries run awry, an extremely dangerous game (7,8)
I believe the answer is:
russian roulette
'dangerous game' is the definition.
(I've seen this before)
'usa lotteries run awry' is the wordplay.
'awry' indicates anagramming the letters.
'usa'+'lotteries'+'run'='usalotteriesrun'
'usalotteriesrun' is an anagram of 'RUSSIAN ROULETTE'.
'an extremely' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for russian roulette that I've seen before include "risky business" , "highrisk game" , "Deadly gamble" , "chancy business" , "deadly stunt" .)