Finally checking everything, then editorial ran (8)

I believe the answer is:

galloped

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'ran' is the definition.
(gallop can mean to run fast)

'finally checking everything then editorial' is the wordplay.
'finally' says to take the final letters.
'everything' becomes 'all' (all things).
'then editorial' becomes 'oped' (I can't explain this - if you can you should believe this answer much more).
The final letter of 'checking' is 'g'.
'g'+'all'+'oped'='GALLOPED'

Can you help me to learn more?

(Other definitions for galloped that I've seen before include "'I - - , Dirck - - ...' (Browning)" , "Went at a very fast gait" , "Ran" , "what did Joris and Dirck do?" , "A peg doll (anag.)" .)

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

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