Favours "directs one's attention to the page before" (7)
I believe the answer is:
prefers
'favours' is the definition.
('prefer' can be a synonym of 'favour')
'directs one's attention to the page before' is the wordplay.
I cannot quite understand how this works, but
'directs' could be 'refers' (referring is a kind of directing) and 'refers' is found within the answer.
'page' could be 'p' and 'p' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for prefers that I've seen is " Favours".)