Book — what to do with it and what to buy it with (5)
I believe the answer is:
bread
'do with it and what to buy it with' is the definition.
I can't judge whether this defines the answer.
'book what' is the wordplay.
'book' becomes 'b'.
'what' becomes 'read' (I can't explain this - if you can you should believe this answer much more).
'b'+'read'='BREAD'
'to' is the link.
Can you help me to learn more?
(Other definitions for bread that I've seen before include "Baked food; money" , "Eg, loaf or rolls" , "''Eaten . . . . . is soon forgotte''" , "It's made with 23" , "Food; money (informal)" .)