How to make bats sell out? (8)
I believe the answer is:
'sell out?' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'how to make bats' is the wordplay.
'how' becomes 'back' (I can't justify this - if you can you should believe this answer much more).
'to make' indicates anagramming the letters.
'bats' with letters rearranged gives 'stab'.
Can you help me to learn more?