Even BB King goes to Switzerland to view flipping energy of The Boss (3,6)
I believe the answer is:
big cheese
'the boss' is the definition.
(I've seen this in another clue)
'even bb king goes to switzerland' is the wordplay.
'even' indicates alternate letters (even-numbered letters are used).
'goes to' means one lot of letters go next to another.
'switzerland' becomes 'cheese' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'bb'+'king'='bbking'
The alternating letters of 'bbking' are 'big'.
'big'+'cheese'='BIG CHEESE'
'to view flipping energy of' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for big cheese that I've seen before include "Notable" , "VIP" , "Important person (slang)" , "Mousetrap attraction!" , "Large cake of Cheshire, perhaps" .)