Crossword Genius

A book collection knight brought up for lord? (6)

Ross

I believe the answer is:

aristo

I'm a little stuck... Click here to teach me more about this clue!

'a book' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'collection knight brought up for lord?' is the wordplay.
I cannot really see how this works, but
'up' could be 'is' (I've seen this in other clues) and 'is' is located in the answer.
'collection' could be 'art' (art collection is a kind of collection) and 'art' is found within the remaining letters.
A single letter 'o' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for aristo that I've seen before include "Member of the nobility (abbr)" , "one of the best" , "Nob" , "High-hat" , "Toff" .)

I've seen this clue in The Independent.
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