Staring at a torn page (5)
I believe the answer is:
agape
'staring' is the definition.
(I've seen this in another clue)
'at a torn page' is the wordplay.
'at' says to put letters next to each other.
'torn' is an anagram indicator.
'page' is an anagram of 'gape'.
'a' next to 'gape' is 'AGAPE'.
(Other definitions for agape that I've seen before include "ecclesiastical feast" , "showing disbelief" , "Christian feast" , "(Of mouth) wide open" , "the love of God!" .)