Made a mockery of Mr Fawkes? (5)

I believe the answer is:

guyed

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'made a mockery' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Maybe they are linked in a way I don't understand?

'mr fawkes?' is the wordplay.
'mr' becomes 'Guy'.
'fawkes?' becomes 'ed' (I can't explain this - if you can you should believe this answer much more).
'guy'+'ed'='GUYED'

'of' is the link.

Can you help me to learn more?

(Other definitions for guyed that I've seen before include "Made fun of - kept in position by ropes" , "Secured with rope" , "sent up" .)

I've seen this clue in the Evening Standard.

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