Putting bin on rear switch is a good idea, obviously! (2-7)
I believe the answer is:
no-brainer
'a good idea obviously' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'putting bin on rear switch' is the wordplay.
'putting' becomes 'no' (I can't explain this - if you can you should believe this answer much more).
'on' is a charade indicator (letters next to each other).
'switch' indicates an anagram.
'bin' put after 'rear' is 'rearbin'.
'rearbin' with letters rearranged gives 'brainer'.
'no'+'brainer'='NO-BRAINER'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for no-brainer that I've seen before include "Obvious choice" , "Something involving little or no mental effort" , "That which must be done, obviously" , "Something requiring little thought" , "Something requiring little or no mental effort" .)