Lever end off pack (some chocolate?) (7)
I believe the answer is:
crowbar
'lever' is the definition.
(I know that crowbar is a type of lever)
'end off pack some chocolate?' is the wordplay.
'end off pack' becomes 'crow' (I can't justify this - if you can you should give a lot more credence to this answer).
'some chocolate?' becomes 'bar' (chocolate bar).
'crow'+'bar'='CROWBAR'
Can you help me to learn more?
(Other definitions for crowbar that I've seen before include "The means to get leverage" , "Burglar's tool, perhaps" , "that can exert powerful leverage" , "Jemmy" , "Metal rod used as a lever" .)