Flea destroyed page in book (4)

I believe the answer is:

leaf

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

'page in book' is the definition.
'leaf' can be an answer for 'page' (leaf can mean a page). I'm unsure of the 'in book' bit.

'flea destroyed' is the wordplay.
'destroyed' is an anagram indicator.
'flea' anagrammed gives 'LEAF'.

Can you help me to learn more?

(Other definitions for leaf that I've seen before include "Small part of wood" , "Bit of foliage" , "Sheet of paper" , "needed for making a longer table" , "Frond" .)

I've seen this clue in The Sun.

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