Hymn bringing wonder to good group of people (7,5)
I believe the answer is:
amazing grace
'hymn' is the definition.
(I've seen this before)
'bringing wonder to good group of people' is the wordplay.
'bringing wonder' becomes 'amazing' (to amaze is to provoke wonder).
'to good' becomes 'g' (abbreviation).
'group of people' becomes 'race' (I've seen this in other clues).
'amazing'+'g'+'race'='AMAZING GRACE'
(Other definitions for amazing grace that I've seen before include "religious air" , "song" , "Hymn that "sav'd a wretch like me"?" , "knocking cricketer for six?" , "Noted words of praise" .)