Ill feeling caused by sin? (7)

I believe the answer is:

offence

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'sin?' is the definition.
(thesaurus)

'ill feeling' is the wordplay.
'ill' becomes 'off' (off can mean unwell or ill).
'feeling' becomes 'ence' (I can't justify this - if you can you should believe this answer much more).
'off'+'ence'='OFFENCE'

'caused by' acts as a link.

Can you help me to learn more?

(Other definitions for offence that I've seen before include "misdemeanor" , "Criminal action" , "Breach of conduct" , "Peccadillo" , "Misdeed" .)

I've seen this clue in the Sydney Morning Herald.

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