Pop back, lever up then tell you (7)
I believe the answer is:
apprise
'tell you' is the definition.
'apprise' can be an answer for 'tell' (I've seen this before). I am unsure of the 'you' bit.
'pop back lever up' is the wordplay.
'pop' becomes 'pa' (both can mean father).
'back' says the letters should be written in reverse.
'lever up' becomes 'prise' (synonyms. I am not sure about the 'up' bit.).
'pa' backwards is 'ap'.
'ap'+'prise'='APPRISE'
'then' acts as a link.
Can you help me to learn more?
(Other definitions for apprise that I've seen before include "Give information to" , "Inform, make aware of" , "tip off" , "Give notice" , "Provide with information" .)