Peer oddly at book and feel sorry (6)
I believe the answer is:
repent
'feel sorry' is the definition.
(I've seen this before)
'peer oddly at book' is the wordplay.
'oddly' is an anagram indicator (letters in an odd order).
'at' is a charade indicator (letters next to each other).
'book' becomes 'nt' (New Testament).
'peer' is an anagram of 'repe'.
'repe'+'nt'='REPENT'
'and' is the link.
(Other definitions for repent that I've seen before include "Feel sorry" , "Be sorry for wrongdoing" , "John the Baptist's cry" , "Be contrite, ye sinners" , "Feel regret/remorse" .)