A book just for you (6)

I believe the answer is:

reader

I believe this clue 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' is the 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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