A book just for you (6)

I believe the answer is:

reader

I believe this is a double definition.

'a book' is the first definition.
(reader is a kind of book)

'for you' is the second definition.
(I've seen this before)

'just' acts as a link.

(Other definitions for reader that I've seen before include "Interpreter of what is written" , "(User of) standard textbook" , "Text book -- red ear (anag)" , "Kind of textbook - or its peruser" , "' -- , I married him' (J. Eyre)" .)

I've seen this clue in the Evening Standard.

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