Edits ultimately spoil story about wise guy (5,4)

I believe the answer is:

smart alec

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'guy' is the definition.
(I have seen 'wise guy' mean 'smart alec' so perhaps 'guy' could also mean 'smart alec')

'edits ultimately spoil story about wise' is the wordplay.
'ultimately' says to take the final letters.
'spoil' becomes 'mar' (synonyms).
'story' becomes 'tale' (synonyms).
'about wise' becomes 'c' (I can't justify this - if you can you should believe this answer much more).
The last letter of 'edits' is 's'.
's'+'mar'+'tale'+'c'='SMART-ALEC'

Can you help me to learn more?

(Other definitions for smart alec that I've seen before include "Clever Dick" , "Know-all" , "annoying person" , "insufferable type" , "wise guy" .)

I've seen this clue in The Daily Express.

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