Kipper heeded original sin in middle age (7)
I believe the answer is:
herring
'kipper' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'heeded original sin in middle age' is the wordplay.
'original' indicates taking the first letters (the origin of the word).
'sin' becomes 'err' (to sin is to err morally).
'middle' means to look at the middle letters.
The central letter of 'age' is 'g'.
The initial letter of 'heeded' is 'h'.
'h'+'err'+'in'+'g'='HERRING'
Can you help me to learn more?
(Other definitions for herring that I've seen before include "It's certainly fishy!" , "Small silvery sea-fish" , "Fish, often kippered" , "Fish that's kippered" , "Common food fish" .)