Totally, as far as the blade goes (2,3,4)

I believe the answer is:

to the hilt

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'totally' is the definition.
(thesaurus)

'as far as the blade goes' is the wordplay.
'as far as' becomes 'to'.
'blade goes' becomes 'hilt' (I can't explain this - if you can you should believe this answer much more).
'to'+'the'+'hilt'='TO THE HILT'

Can you help me to learn more?

(Other definitions for to the hilt that I've seen before include "Completely" , "as much as possible" .)

I've seen this clue in The Daily Express.

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