Look beyond page two (4)
I believe the answer is:
Here is my best explanation:
'two' is the definition.
(pair is a kind of two)
'look beyond page' is the wordplay.
'look' becomes 'air' (I've seen this before).
'beyond' says to put letters next to each other.
'page' becomes 'p'.
'air' after 'p' is 'PAIR'.
(Other definitions for pair that I've seen before include "2", "Brace, couple", "Couple - wed", "how braces come", "players of duet?", "Duet", "Cereal used as food", "Agreement to avoid division", "Two of a kind, as in cards" and "Twins".)