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' means one lot of letters go next to another.
'torn' indicates an anagram.
'page' anagrammed gives 'gape'.
'a'+'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!" .)