Favours "directs one's attention to the page before" (7)
I believe the answer is:
prefers
'favours' is the definition.
(I know this)
'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 in the answer.
'page' could be 'p' and 'p' is present in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for prefers that I've seen is " Favours".)