It's A Magical World that can't be put down (9)

I believe the answer is:

neverland

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'it's a magical world that can't' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'put down' is the wordplay.
'put' becomes 'never' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'down' becomes 'land' (synonyms).
'never'+'land'='NEVERLAND'

'be' acts as a link.

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