Unconscious of big game of chance (6)
I believe the answer is:
blotto
'unconscious' is the definition.
Both the definition and answer are adjectives. Maybe there's a link between them I don't understand?
'big game of chance' is the wordplay.
'big' becomes 'b' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'game of chance' becomes 'lotto' (I've seen this before).
'b'+'lotto'='BLOTTO'
'of' is the link.
Can you help me to learn more?
(Other definitions for blotto that I've seen before include "Wasted" , "Very drunk (informal)" , "To bolt away in drunk state" , "Get very drunk" , "Smashed" .)