Old fear and hurt transformed in prayer (3,6)
I believe the answer is:
our father
'prayer' is the definition.
(I've seen this before)
'old fear and hurt transformed' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'and' says to put letters next to each other.
'transformed' indicates an anagram.
'fear' after 'hurt' is 'hurtfear'.
'hurtfear' with letters rearranged gives 'urfather'.
'o'+'urfather'='OUR FATHER'
'in' is the link.
(Other definitions for our father that I've seen before include "Lord's Prayer" , "God" , "head of family" , "Early bit of devotion" , "Pater noster" .)