Camberwell's bookish beauty (5)

I believe the answer is:

amber

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

'bookish beauty' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe you can see a link between them that I can't see?

'camberwell's' is the wordplay.
'AMBER' is hidden within the letters.
But, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for amber that I've seen before include "Dark yellow" , "Orange traffic light" , "Middle light" , "Young bird of prey" , "Road warning" .)

I've seen this clue in the Evening Standard.

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