Pick clubs in opulent environment - it's the end for some (8,5)
I believe the answer is:
electric chair
'the end for some' is the definition.
I can't judge whether this definition defines the answer.
'pick clubs in opulent environment' is the wordplay.
'pick' becomes 'elect' (to elect is to pick or select).
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'in' is an insertion indicator.
'opulent' becomes 'rich' (similar in meaning).
'environment' becomes 'air' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'c' inserted into 'rich' is 'ricch'.
'elect'+'ricch'+'air'='ELECTRIC CHAIR'
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for electric chair that I've seen before include "US form of execution" , "Device for execution in some US states" , "Device for executing criminals" , "US means of execution" , "Execution apparatus" .)