Crossword Genius

Demands (and gets) old book (6)

Ross

I believe the answer is:

exacts

'demands and gets' is the definition.

'old book' is the wordplay.
'old' becomes 'ex'.
'book' becomes 'acts' (I've seen this before).
'ex'+'acts'='EXACTS'

(Other definitions for exacts that I've seen before include "Insists on and obtains, say payment - sounds precise" , "Extorts" , "Compels payment of" , "Insists on or claims" , "making demands" .)

I've seen this clue in The Guardian.
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