You have to do so (7)
I believe the answer is:
possess
'you have' is the definition.
'possess' can be an answer for 'have' (I've seen this before). I am not sure about the 'you' bit.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for possess that I've seen before include "Have - control" , "Have as one's own" , "Have ownership of" , "Have and hold" , "Own, keep" .)