In favour of ending peace by violence (5)

I believe the answer is:

force

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'violence' is the definition.
(I know that violence can be written as force)

'in favour of ending peace' is the wordplay.
'in favour of' becomes 'for' (being for a particular cause).
'ending peace' becomes 'ce' (I can't justify this - if you can you should believe this answer much more).
'for'+'ce'='FORCE'

'by' is the link.

Can you help me to learn more?

(Other definitions for force that I've seen before include "Strength, power" , "Lean on" , "Power; army" , "Impetus" , "cascade of water" .)

I've seen this clue in the Evening Standard.

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