Stares at torn pages (5)
I believe the answer is:
gapes
'stares' is the definition.
(gape is a kind of stare)
'torn pages' is the wordplay.
'torn' indicates an anagram.
'pages' is an anagram of 'GAPES'.
'at' acts as a link.
(Other definitions for gapes that I've seen before include "goggles" , "Opens mouth wide in surprise" , "Stares at with mouth wide open" , "Looks amazedly into pages" , "seems very surprised" .)