Here's a book for you (6)
I believe the answer is:
reader
'you' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for reader that I've seen before include "Reared by book lover" , "Peruser of texts" , "She lectures" , "Person studying a book" , "University lecturer; book of educational extracts" .)