Counsel against getting involved in a game of chance (6)
I believe the answer is:
advice
'counsel' is the definition.
(thesaurus)
'against getting involved in a game of chance' is the wordplay.
'against' becomes 'v' (abbreviation for 'versus').
'getting involved in' means one lot of letters goes inside another.
'game of chance' becomes 'dice' (I can't explain this - if you can you should give a lot more credence to this answer).
'a'+'dice'='adice'
'v' going into 'adice' is 'ADVICE'.
Can you help me to learn more?
(Other definitions for advice that I've seen before include "Warning - guidance" , "Opinion offered as to future action" , "Admonition" , "Counselling" , "Recommendation for a course of action" .)