Bounder quietly admitted to mortal sin — and it shocked (12)
I believe the answer is:
trampolinist
'bounder' is the definition.
Both the answer and definition are singular nouns.
Perhaps you can see an association between them that I don't see?
'quietly admitted to mortal sin and it shocked' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'admitted to' is an insertion indicator.
'and' means one lot of letters go next to another.
'shocked' is an anagram indicator (letters are shocked or disrupted).
'mortal'+'sin'+'it'='mortalsinit'
'mortalsinit' with letters rearranged gives 'tramolinist'.
'p' placed into 'tramolinist' is 'TRAMPOLINIST'.
Can you help me to learn more?
(Other definitions for trampolinist that I've seen before include "Jumper" , "Club bouncer" , "gymnast" .)